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perf: remove extra pass used for inverse transforms#114

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Shnatsel merged 1 commit intomainfrom
improve-inverse-transforms
Apr 17, 2026
Merged

perf: remove extra pass used for inverse transforms#114
Shnatsel merged 1 commit intomainfrom
improve-inverse-transforms

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@smu160 smu160 commented Apr 17, 2026

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codecov-commenter commented Apr 17, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.80%. Comparing base (f18c455) to head (1bc5dee).

Additional details and impacted files 
@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
- Coverage   98.80%   98.80%   -0.01%     
==========================================
  Files           9        9              
  Lines        2090     2086       -4     
==========================================
- Hits         2065     2061       -4     
  Misses         25       25

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smu160 commented Apr 17, 2026

Benchmark run using cargo bench --bench bench "Inverse" on main followed by this branch (i.e., improve-inverse-transforms)

     Running benches/bench.rs (target/release/deps/bench-bbf0fdc7d8455996)
Inverse f32/PhastFT DIT/64
                        time:   [104.98 ns 105.34 ns 105.64 ns]
                        thrpt:  [605.83 Melem/s 607.56 Melem/s 609.62 Melem/s]
                        thrpt:  [4.5138 GiB/s 4.5267 GiB/s 4.5420 GiB/s]
                 change:
                        time:   [−4.8154% −4.1888% −3.6227%] (p = 0.00 < 0.05)
                        thrpt:  [+3.7589% +4.3720% +5.0590%]
                        Performance has improved.
Inverse f32/RustFFT/64  time:   [82.849 ns 83.078 ns 83.313 ns]
                        thrpt:  [768.19 Melem/s 770.36 Melem/s 772.49 Melem/s]
                        thrpt:  [5.7234 GiB/s 5.7396 GiB/s 5.7555 GiB/s]
                 change:
                        time:   [−0.2569% +0.3474% +0.9639%] (p = 0.28 > 0.05)
                        thrpt:  [−0.9547% −0.3462% +0.2576%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Inverse f32/PhastFT DIT/128
                        time:   [191.54 ns 192.26 ns 192.91 ns]
                        thrpt:  [663.51 Melem/s 665.76 Melem/s 668.28 Melem/s]
                        thrpt:  [4.9435 GiB/s 4.9603 GiB/s 4.9791 GiB/s]
                 change:
                        time:   [−1.9898% −1.2865% −0.5853%] (p = 0.00 < 0.05)
                        thrpt:  [+0.5887% +1.3033% +2.0302%]
                        Change within noise threshold.
Inverse f32/RustFFT/128 time:   [161.96 ns 162.57 ns 163.05 ns]
                        thrpt:  [785.05 Melem/s 787.37 Melem/s 790.30 Melem/s]
                        thrpt:  [5.8490 GiB/s 5.8664 GiB/s 5.8882 GiB/s]
                 change:
                        time:   [−0.4560% +0.1637% +0.7676%] (p = 0.61 > 0.05)
                        thrpt:  [−0.7617% −0.1634% +0.4581%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/256
                        time:   [384.81 ns 386.86 ns 388.49 ns]
                        thrpt:  [658.97 Melem/s 661.73 Melem/s 665.26 Melem/s]
                        thrpt:  [4.9097 GiB/s 4.9303 GiB/s 4.9566 GiB/s]
                 change:
                        time:   [+0.5728% +1.7399% +2.8282%] (p = 0.01 < 0.05)
                        thrpt:  [−2.7504% −1.7102% −0.5696%]
                        Change within noise threshold.
Inverse f32/RustFFT/256 time:   [356.68 ns 358.39 ns 359.98 ns]
                        thrpt:  [711.15 Melem/s 714.32 Melem/s 717.74 Melem/s]
                        thrpt:  [5.2985 GiB/s 5.3221 GiB/s 5.3476 GiB/s]
                 change:
                        time:   [−0.4336% +0.2326% +0.9208%] (p = 0.52 > 0.05)
                        thrpt:  [−0.9124% −0.2320% +0.4355%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/512
                        time:   [739.72 ns 742.29 ns 744.47 ns]
                        thrpt:  [687.74 Melem/s 689.75 Melem/s 692.16 Melem/s]
                        thrpt:  [5.1241 GiB/s 5.1391 GiB/s 5.1570 GiB/s]
                 change:
                        time:   [−2.7715% −1.9877% −1.2448%] (p = 0.00 < 0.05)
                        thrpt:  [+1.2605% +2.0280% +2.8505%]
                        Performance has improved.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Inverse f32/RustFFT/512 time:   [742.34 ns 745.53 ns 748.44 ns]
                        thrpt:  [684.09 Melem/s 686.76 Melem/s 689.71 Melem/s]
                        thrpt:  [5.0969 GiB/s 5.1167 GiB/s 5.1387 GiB/s]
                 change:
                        time:   [−2.8057% −1.4563% −0.2680%] (p = 0.03 < 0.05)
                        thrpt:  [+0.2687% +1.4778% +2.8867%]
                        Change within noise threshold.
Inverse f32/PhastFT DIT/1024
                        time:   [1.6186 µs 1.6252 µs 1.6306 µs]
                        thrpt:  [627.97 Melem/s 630.08 Melem/s 632.64 Melem/s]
                        thrpt:  [4.6787 GiB/s 4.6945 GiB/s 4.7136 GiB/s]
                 change:
                        time:   [−2.5054% −1.3760% −0.4269%] (p = 0.01 < 0.05)
                        thrpt:  [+0.4287% +1.3952% +2.5698%]
                        Change within noise threshold.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f32/RustFFT/1024
                        time:   [2.0160 µs 2.0399 µs 2.0530 µs]
                        thrpt:  [498.77 Melem/s 502.00 Melem/s 507.95 Melem/s]
                        thrpt:  [3.7162 GiB/s 3.7402 GiB/s 3.7845 GiB/s]
                 change:
                        time:   [−3.8195% +0.4465% +4.9310%] (p = 0.84 > 0.05)
                        thrpt:  [−4.6993% −0.4445% +3.9712%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/2048
                        time:   [3.4517 µs 3.4639 µs 3.4724 µs]
                        thrpt:  [589.79 Melem/s 591.23 Melem/s 593.34 Melem/s]
                        thrpt:  [4.3943 GiB/s 4.4050 GiB/s 4.4207 GiB/s]
                 change:
                        time:   [−3.7818% −2.7880% −1.8185%] (p = 0.00 < 0.05)
                        thrpt:  [+1.8522% +2.8680% +3.9304%]
                        Performance has improved.
Inverse f32/RustFFT/2048
                        time:   [4.4014 µs 4.4729 µs 4.5131 µs]
                        thrpt:  [453.79 Melem/s 457.87 Melem/s 465.31 Melem/s]
                        thrpt:  [3.3810 GiB/s 3.4114 GiB/s 3.4668 GiB/s]
                 change:
                        time:   [−6.1638% −0.1880% +5.6333%] (p = 0.95 > 0.05)
                        thrpt:  [−5.3329% +0.1884% +6.5687%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/4096
                        time:   [8.0130 µs 8.0716 µs 8.1104 µs]
                        thrpt:  [505.03 Melem/s 507.46 Melem/s 511.17 Melem/s]
                        thrpt:  [3.7628 GiB/s 3.7809 GiB/s 3.8085 GiB/s]
                 change:
                        time:   [−3.3384% −1.2498% +0.8140%] (p = 0.25 > 0.05)
                        thrpt:  [−0.8075% +1.2656% +3.4537%]
                        No change in performance detected.
Inverse f32/RustFFT/4096
                        time:   [8.5182 µs 8.5737 µs 8.6099 µs]
                        thrpt:  [475.73 Melem/s 477.74 Melem/s 480.85 Melem/s]
                        thrpt:  [3.5445 GiB/s 3.5594 GiB/s 3.5826 GiB/s]
                 change:
                        time:   [−1.9275% −0.1402% +1.5678%] (p = 0.88 > 0.05)
                        thrpt:  [−1.5436% +0.1404% +1.9654%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/8192
                        time:   [17.325 µs 17.453 µs 17.535 µs]
                        thrpt:  [467.17 Melem/s 469.36 Melem/s 472.85 Melem/s]
                        thrpt:  [3.4807 GiB/s 3.4970 GiB/s 3.5230 GiB/s]
                 change:
                        time:   [−4.2892% −2.0288% +0.3189%] (p = 0.10 > 0.05)
                        thrpt:  [−0.3179% +2.0708% +4.4815%]
                        No change in performance detected.
Inverse f32/RustFFT/8192
                        time:   [17.243 µs 17.341 µs 17.409 µs]
                        thrpt:  [470.56 Melem/s 472.39 Melem/s 475.08 Melem/s]
                        thrpt:  [3.5060 GiB/s 3.5196 GiB/s 3.5396 GiB/s]
                 change:
                        time:   [−1.3353% +0.1470% +1.6487%] (p = 0.85 > 0.05)
                        thrpt:  [−1.6220% −0.1467% +1.3534%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/16384
                        time:   [41.048 µs 41.355 µs 41.555 µs]
                        thrpt:  [394.27 Melem/s 396.18 Melem/s 399.14 Melem/s]
                        thrpt:  [2.9376 GiB/s 2.9518 GiB/s 2.9738 GiB/s]
                 change:
                        time:   [−4.4546% −2.3035% −0.3077%] (p = 0.04 < 0.05)
                        thrpt:  [+0.3087% +2.3578% +4.6623%]
                        Change within noise threshold.
Inverse f32/RustFFT/16384
                        time:   [39.217 µs 39.402 µs 39.548 µs]
                        thrpt:  [414.28 Melem/s 415.82 Melem/s 417.78 Melem/s]
                        thrpt:  [3.0866 GiB/s 3.0981 GiB/s 3.1127 GiB/s]
                 change:
                        time:   [−5.3656% −1.5434% +0.9524%] (p = 0.54 > 0.05)
                        thrpt:  [−0.9434% +1.5676% +5.6698%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/32768
                        time:   [89.950 µs 90.498 µs 90.858 µs]
                        thrpt:  [360.65 Melem/s 362.08 Melem/s 364.29 Melem/s]
                        thrpt:  [2.6871 GiB/s 2.6977 GiB/s 2.7142 GiB/s]
                 change:
                        time:   [−3.3441% −1.5469% +0.3864%] (p = 0.13 > 0.05)
                        thrpt:  [−0.3849% +1.5712% +3.4598%]
                        No change in performance detected.
Inverse f32/RustFFT/32768
                        time:   [84.313 µs 85.057 µs 85.593 µs]
                        thrpt:  [382.84 Melem/s 385.25 Melem/s 388.65 Melem/s]
                        thrpt:  [2.8523 GiB/s 2.8703 GiB/s 2.8957 GiB/s]
                 change:
                        time:   [−1.7249% +0.2592% +2.2033%] (p = 0.80 > 0.05)
                        thrpt:  [−2.1558% −0.2586% +1.7552%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/65536
                        time:   [213.17 µs 213.99 µs 214.75 µs]
                        thrpt:  [305.17 Melem/s 306.25 Melem/s 307.44 Melem/s]
                        thrpt:  [2.2737 GiB/s 2.2818 GiB/s 2.2906 GiB/s]
                 change:
                        time:   [−2.8097% −1.9807% −1.2297%] (p = 0.00 < 0.05)
                        thrpt:  [+1.2450% +2.0207% +2.8909%]
                        Performance has improved.
Inverse f32/RustFFT/65536
                        time:   [192.12 µs 194.24 µs 195.72 µs]
                        thrpt:  [334.85 Melem/s 337.40 Melem/s 341.11 Melem/s]
                        thrpt:  [2.4948 GiB/s 2.5138 GiB/s 2.5415 GiB/s]
                 change:
                        time:   [−1.9066% +0.8367% +3.7532%] (p = 0.57 > 0.05)
                        thrpt:  [−3.6174% −0.8298% +1.9437%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/131072
                        time:   [440.45 µs 443.68 µs 445.64 µs]
                        thrpt:  [294.12 Melem/s 295.42 Melem/s 297.58 Melem/s]
                        thrpt:  [2.1914 GiB/s 2.2011 GiB/s 2.2172 GiB/s]
                 change:
                        time:   [−3.0361% −1.6995% −0.2245%] (p = 0.04 < 0.05)
                        thrpt:  [+0.2250% +1.7289% +3.1311%]
                        Change within noise threshold.
Inverse f32/RustFFT/131072
                        time:   [388.39 µs 392.01 µs 394.25 µs]
                        thrpt:  [332.46 Melem/s 334.36 Melem/s 337.48 Melem/s]
                        thrpt:  [2.4770 GiB/s 2.4912 GiB/s 2.5144 GiB/s]
                 change:
                        time:   [−3.1126% −0.1263% +2.8645%] (p = 0.94 > 0.05)
                        thrpt:  [−2.7848% +0.1264% +3.2126%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/262144
                        time:   [1.0155 ms 1.0274 ms 1.0347 ms]
                        thrpt:  [253.34 Melem/s 255.16 Melem/s 258.13 Melem/s]
                        thrpt:  [1.8876 GiB/s 1.9011 GiB/s 1.9233 GiB/s]
                 change:
                        time:   [−5.6947% −2.0136% +1.9271%] (p = 0.33 > 0.05)
                        thrpt:  [−1.8907% +2.0550% +6.0386%]
                        No change in performance detected.
Inverse f32/RustFFT/262144
                        time:   [850.00 µs 855.50 µs 859.35 µs]
                        thrpt:  [305.05 Melem/s 306.42 Melem/s 308.41 Melem/s]
                        thrpt:  [2.2728 GiB/s 2.2830 GiB/s 2.2978 GiB/s]
                 change:
                        time:   [−2.1950% +0.2882% +2.9513%] (p = 0.83 > 0.05)
                        thrpt:  [−2.8667% −0.2874% +2.2442%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  2 (10.00%) low mild
  1 (5.00%) high mild
Inverse f32/PhastFT DIT/524288
                        time:   [2.1759 ms 2.1998 ms 2.2148 ms]
                        thrpt:  [236.72 Melem/s 238.33 Melem/s 240.96 Melem/s]
                        thrpt:  [1.7637 GiB/s 1.7757 GiB/s 1.7953 GiB/s]
                 change:
                        time:   [−6.7993% −2.6360% +1.6522%] (p = 0.24 > 0.05)
                        thrpt:  [−1.6254% +2.7074% +7.2954%]
                        No change in performance detected.
Inverse f32/RustFFT/524288
                        time:   [1.7782 ms 1.7868 ms 1.7939 ms]
                        thrpt:  [292.26 Melem/s 293.43 Melem/s 294.84 Melem/s]
                        thrpt:  [2.1775 GiB/s 2.1862 GiB/s 2.1968 GiB/s]
                 change:
                        time:   [−1.3720% +0.6762% +2.7677%] (p = 0.55 > 0.05)
                        thrpt:  [−2.6931% −0.6717% +1.3911%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  2 (10.00%) low severe
  1 (5.00%) low mild
Inverse f32/PhastFT DIT/1048576
                        time:   [4.7073 ms 4.7595 ms 4.7981 ms]
                        thrpt:  [218.54 Melem/s 220.31 Melem/s 222.76 Melem/s]
                        thrpt:  [1.6282 GiB/s 1.6414 GiB/s 1.6597 GiB/s]
                 change:
                        time:   [−4.0123% −1.1806% +2.0324%] (p = 0.47 > 0.05)
                        thrpt:  [−1.9919% +1.1947% +4.1800%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) low mild
Inverse f32/RustFFT/1048576
                        time:   [3.8205 ms 3.8386 ms 3.8656 ms]
                        thrpt:  [271.25 Melem/s 273.16 Melem/s 274.46 Melem/s]
                        thrpt:  [2.0210 GiB/s 2.0352 GiB/s 2.0449 GiB/s]
                 change:
                        time:   [−0.3582% +0.8426% +2.2313%] (p = 0.26 > 0.05)
                        thrpt:  [−2.1826% −0.8356% +0.3594%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  1 (5.00%) high mild
  2 (10.00%) high severe
Inverse f32/PhastFT DIT/2097152
                        time:   [10.431 ms 10.519 ms 10.579 ms]
                        thrpt:  [198.24 Melem/s 199.36 Melem/s 201.06 Melem/s]
                        thrpt:  [1.4770 GiB/s 1.4853 GiB/s 1.4980 GiB/s]
                 change:
                        time:   [−6.5955% −3.4958% −0.0574%] (p = 0.05 > 0.05)
                        thrpt:  [+0.0575% +3.6224% +7.0613%]
                        No change in performance detected.
Found 4 outliers among 20 measurements (20.00%)
  4 (20.00%) low mild
Inverse f32/RustFFT/2097152
                        time:   [8.8552 ms 8.9411 ms 9.0507 ms]
                        thrpt:  [231.71 Melem/s 234.55 Melem/s 236.83 Melem/s]
                        thrpt:  [1.7264 GiB/s 1.7476 GiB/s 1.7645 GiB/s]
                 change:
                        time:   [+0.2666% +1.4538% +2.6653%] (p = 0.03 < 0.05)
                        thrpt:  [−2.5961% −1.4330% −0.2659%]
                        Change within noise threshold.
Benchmarking Inverse f32/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 7.3s, enable flat sampling, or reduce sample count to 10.
Inverse f32/PhastFT DIT/4194304
                        time:   [24.328 ms 24.482 ms 24.589 ms]
                        thrpt:  [170.57 Melem/s 171.32 Melem/s 172.41 Melem/s]
                        thrpt:  [1.2709 GiB/s 1.2765 GiB/s 1.2845 GiB/s]
                 change:
                        time:   [−4.6222% −3.0360% −1.4847%] (p = 0.00 < 0.05)
                        thrpt:  [+1.5071% +3.1311% +4.8462%]
                        Performance has improved.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Benchmarking Inverse f32/RustFFT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 6.5s, enable flat sampling, or reduce sample count to 10.
Inverse f32/RustFFT/4194304
                        time:   [20.714 ms 20.861 ms 21.000 ms]
                        thrpt:  [199.73 Melem/s 201.06 Melem/s 202.48 Melem/s]
                        thrpt:  [1.4881 GiB/s 1.4980 GiB/s 1.5086 GiB/s]
                 change:
                        time:   [−2.8285% −1.5673% −0.3945%] (p = 0.02 < 0.05)
                        thrpt:  [+0.3960% +1.5923% +2.9108%]
                        Change within noise threshold.
Found 3 outliers among 20 measurements (15.00%)
  2 (10.00%) high mild
  1 (5.00%) high severe
Inverse f32/PhastFT DIT/8388608
                        time:   [51.937 ms 52.674 ms 53.650 ms]
                        thrpt:  [156.36 Melem/s 159.26 Melem/s 161.52 Melem/s]
                        thrpt:  [1.1650 GiB/s 1.1865 GiB/s 1.2034 GiB/s]
                 change:
                        time:   [−1.9132% −0.4811% +1.5693%] (p = 0.62 > 0.05)
                        thrpt:  [−1.5451% +0.4834% +1.9505%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  1 (5.00%) high mild
  2 (10.00%) high severe
Inverse f32/RustFFT/8388608
                        time:   [43.708 ms 43.871 ms 44.060 ms]
                        thrpt:  [190.39 Melem/s 191.21 Melem/s 191.93 Melem/s]
                        thrpt:  [1.4185 GiB/s 1.4246 GiB/s 1.4300 GiB/s]
                 change:
                        time:   [−0.7289% −0.0763% +0.5399%] (p = 0.82 > 0.05)
                        thrpt:  [−0.5370% +0.0763% +0.7343%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Inverse f32/PhastFT DIT/16777216
                        time:   [107.79 ms 108.66 ms 109.96 ms]
                        thrpt:  [152.57 Melem/s 154.40 Melem/s 155.65 Melem/s]
                        thrpt:  [1.1367 GiB/s 1.1504 GiB/s 1.1597 GiB/s]
                 change:
                        time:   [−2.3257% −1.3417% −0.0303%] (p = 0.03 < 0.05)
                        thrpt:  [+0.0303% +1.3599% +2.3811%]
                        Change within noise threshold.
Found 4 outliers among 20 measurements (20.00%)
  1 (5.00%) high mild
  3 (15.00%) high severe
Inverse f32/RustFFT/16777216
                        time:   [91.657 ms 92.048 ms 92.514 ms]
                        thrpt:  [181.35 Melem/s 182.27 Melem/s 183.04 Melem/s]
                        thrpt:  [1.3511 GiB/s 1.3580 GiB/s 1.3638 GiB/s]
                 change:
                        time:   [−0.2693% +0.3543% +1.0430%] (p = 0.29 > 0.05)
                        thrpt:  [−1.0323% −0.3530% +0.2700%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) high mild

Inverse f64/PhastFT DIT/64
                        time:   [182.92 ns 183.71 ns 184.41 ns]
                        thrpt:  [347.05 Melem/s 348.38 Melem/s 349.87 Melem/s]
                        thrpt:  [5.1715 GiB/s 5.1913 GiB/s 5.2135 GiB/s]
                 change:
                        time:   [−1.5432% −0.3695% +0.8771%] (p = 0.56 > 0.05)
                        thrpt:  [−0.8695% +0.3709% +1.5673%]
                        No change in performance detected.
Inverse f64/RustFFT/64  time:   [149.02 ns 150.03 ns 150.73 ns]
                        thrpt:  [424.60 Melem/s 426.57 Melem/s 429.47 Melem/s]
                        thrpt:  [6.3270 GiB/s 6.3564 GiB/s 6.3995 GiB/s]
                 change:
                        time:   [+10.610% +12.997% +15.357%] (p = 0.00 < 0.05)
                        thrpt:  [−13.312% −11.502% −9.5927%]
                        Performance has regressed.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/PhastFT DIT/128
                        time:   [349.79 ns 350.91 ns 352.03 ns]
                        thrpt:  [363.60 Melem/s 364.76 Melem/s 365.94 Melem/s]
                        thrpt:  [5.4181 GiB/s 5.4354 GiB/s 5.4529 GiB/s]
                 change:
                        time:   [−1.4380% −0.4522% +0.4211%] (p = 0.37 > 0.05)
                        thrpt:  [−0.4193% +0.4542% +1.4590%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/RustFFT/128 time:   [275.73 ns 276.71 ns 277.71 ns]
                        thrpt:  [460.91 Melem/s 462.58 Melem/s 464.22 Melem/s]
                        thrpt:  [6.8680 GiB/s 6.8929 GiB/s 6.9175 GiB/s]
                 change:
                        time:   [+2.2164% +3.2408% +4.1455%] (p = 0.00 < 0.05)
                        thrpt:  [−3.9805% −3.1391% −2.1684%]
                        Performance has regressed.
Found 3 outliers among 20 measurements (15.00%)
  2 (10.00%) low mild
  1 (5.00%) high mild
Inverse f64/PhastFT DIT/256
                        time:   [670.95 ns 673.22 ns 675.36 ns]
                        thrpt:  [379.06 Melem/s 380.26 Melem/s 381.55 Melem/s]
                        thrpt:  [5.6484 GiB/s 5.6663 GiB/s 5.6855 GiB/s]
                 change:
                        time:   [−2.9335% −1.8078% −0.6886%] (p = 0.00 < 0.05)
                        thrpt:  [+0.6933% +1.8411% +3.0221%]
                        Change within noise threshold.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/RustFFT/256 time:   [639.40 ns 642.52 ns 646.31 ns]
                        thrpt:  [396.09 Melem/s 398.43 Melem/s 400.37 Melem/s]
                        thrpt:  [5.9023 GiB/s 5.9371 GiB/s 5.9660 GiB/s]
                 change:
                        time:   [+1.2415% +3.3998% +5.3466%] (p = 0.00 < 0.05)
                        thrpt:  [−5.0752% −3.2880% −1.2263%]
                        Performance has regressed.
Found 5 outliers among 20 measurements (25.00%)
  2 (10.00%) low severe
  1 (5.00%) low mild
  2 (10.00%) high mild
Inverse f64/PhastFT DIT/512
                        time:   [1.4733 µs 1.4785 µs 1.4837 µs]
                        thrpt:  [345.08 Melem/s 346.30 Melem/s 347.52 Melem/s]
                        thrpt:  [5.1420 GiB/s 5.1602 GiB/s 5.1785 GiB/s]
                 change:
                        time:   [−3.4986% −2.0739% −0.6840%] (p = 0.01 < 0.05)
                        thrpt:  [+0.6887% +2.1178% +3.6254%]
                        Change within noise threshold.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) low mild
Inverse f64/RustFFT/512 time:   [1.6629 µs 1.6804 µs 1.6902 µs]
                        thrpt:  [302.92 Melem/s 304.68 Melem/s 307.89 Melem/s]
                        thrpt:  [4.5138 GiB/s 4.5401 GiB/s 4.5879 GiB/s]
                 change:
                        time:   [−4.2545% +0.3233% +5.4320%] (p = 0.90 > 0.05)
                        thrpt:  [−5.1521% −0.3222% +4.4436%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) low mild
Inverse f64/PhastFT DIT/1024
                        time:   [3.0417 µs 3.0548 µs 3.0672 µs]
                        thrpt:  [333.86 Melem/s 335.21 Melem/s 336.66 Melem/s]
                        thrpt:  [4.9748 GiB/s 4.9951 GiB/s 5.0166 GiB/s]
                 change:
                        time:   [−4.5667% −3.4696% −2.3671%] (p = 0.00 < 0.05)
                        thrpt:  [+2.4245% +3.5943% +4.7852%]
                        Performance has improved.
Inverse f64/RustFFT/1024
                        time:   [3.1609 µs 3.1798 µs 3.1921 µs]
                        thrpt:  [320.79 Melem/s 322.03 Melem/s 323.96 Melem/s]
                        thrpt:  [4.7801 GiB/s 4.7986 GiB/s 4.8274 GiB/s]
                 change:
                        time:   [−2.5602% +0.6993% +3.7334%] (p = 0.67 > 0.05)
                        thrpt:  [−3.5990% −0.6945% +2.6275%]
                        No change in performance detected.
Found 4 outliers among 20 measurements (20.00%)
  3 (15.00%) low severe
  1 (5.00%) low mild
Inverse f64/PhastFT DIT/2048
                        time:   [7.2552 µs 7.3052 µs 7.3349 µs]
                        thrpt:  [279.21 Melem/s 280.35 Melem/s 282.28 Melem/s]
                        thrpt:  [4.1606 GiB/s 4.1775 GiB/s 4.2063 GiB/s]
                 change:
                        time:   [−6.1808% −3.6274% −0.9333%] (p = 0.01 < 0.05)
                        thrpt:  [+0.9420% +3.7640% +6.5880%]
                        Change within noise threshold.
Inverse f64/RustFFT/2048
                        time:   [7.2972 µs 7.3438 µs 7.3703 µs]
                        thrpt:  [277.87 Melem/s 278.87 Melem/s 280.65 Melem/s]
                        thrpt:  [4.1406 GiB/s 4.1555 GiB/s 4.1821 GiB/s]
                 change:
                        time:   [−3.4675% −0.4881% +2.5979%] (p = 0.76 > 0.05)
                        thrpt:  [−2.5321% +0.4905% +3.5921%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/4096
                        time:   [15.894 µs 15.989 µs 16.055 µs]
                        thrpt:  [255.12 Melem/s 256.18 Melem/s 257.71 Melem/s]
                        thrpt:  [3.8016 GiB/s 3.8174 GiB/s 3.8402 GiB/s]
                 change:
                        time:   [−5.3503% −3.1560% −0.6185%] (p = 0.02 < 0.05)
                        thrpt:  [+0.6223% +3.2589% +5.6527%]
                        Change within noise threshold.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/RustFFT/4096
                        time:   [14.851 µs 14.927 µs 14.981 µs]
                        thrpt:  [273.42 Melem/s 274.40 Melem/s 275.81 Melem/s]
                        thrpt:  [4.0743 GiB/s 4.0888 GiB/s 4.1098 GiB/s]
                 change:
                        time:   [−2.6367% −0.3836% +1.8375%] (p = 0.75 > 0.05)
                        thrpt:  [−1.8043% +0.3851% +2.7081%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f64/PhastFT DIT/8192
                        time:   [35.768 µs 35.972 µs 36.095 µs]
                        thrpt:  [226.96 Melem/s 227.73 Melem/s 229.03 Melem/s]
                        thrpt:  [3.3819 GiB/s 3.3934 GiB/s 3.4128 GiB/s]
                 change:
                        time:   [−4.6258% −2.2902% +0.1576%] (p = 0.08 > 0.05)
                        thrpt:  [−0.1574% +2.3439% +4.8502%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f64/RustFFT/8192
                        time:   [33.324 µs 33.508 µs 33.632 µs]
                        thrpt:  [243.57 Melem/s 244.48 Melem/s 245.83 Melem/s]
                        thrpt:  [3.6295 GiB/s 3.6430 GiB/s 3.6631 GiB/s]
                 change:
                        time:   [−1.9950% −0.2648% +1.4104%] (p = 0.77 > 0.05)
                        thrpt:  [−1.3908% +0.2655% +2.0356%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/PhastFT DIT/16384
                        time:   [83.485 µs 84.063 µs 84.479 µs]
                        thrpt:  [193.94 Melem/s 194.90 Melem/s 196.25 Melem/s]
                        thrpt:  [2.8899 GiB/s 2.9043 GiB/s 2.9244 GiB/s]
                 change:
                        time:   [−4.8579% −2.6144% −0.5509%] (p = 0.03 < 0.05)
                        thrpt:  [+0.5540% +2.6846% +5.1059%]
                        Change within noise threshold.
Found 4 outliers among 20 measurements (20.00%)
  4 (20.00%) low mild
Inverse f64/RustFFT/16384
                        time:   [81.421 µs 82.011 µs 82.411 µs]
                        thrpt:  [198.81 Melem/s 199.78 Melem/s 201.23 Melem/s]
                        thrpt:  [2.9625 GiB/s 2.9769 GiB/s 2.9985 GiB/s]
                 change:
                        time:   [−3.1619% −0.6564% +1.9271%] (p = 0.62 > 0.05)
                        thrpt:  [−1.8906% +0.6607% +3.2651%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/32768
                        time:   [193.79 µs 194.67 µs 195.29 µs]
                        thrpt:  [167.79 Melem/s 168.33 Melem/s 169.09 Melem/s]
                        thrpt:  [2.5003 GiB/s 2.5083 GiB/s 2.5196 GiB/s]
                 change:
                        time:   [−4.5597% −2.9622% −1.4626%] (p = 0.00 < 0.05)
                        thrpt:  [+1.4844% +3.0526% +4.7775%]
                        Performance has improved.
Inverse f64/RustFFT/32768
                        time:   [175.52 µs 177.10 µs 178.21 µs]
                        thrpt:  [183.87 Melem/s 185.02 Melem/s 186.69 Melem/s]
                        thrpt:  [2.7398 GiB/s 2.7571 GiB/s 2.7819 GiB/s]
                 change:
                        time:   [−2.9608% +0.7329% +4.5833%] (p = 0.72 > 0.05)
                        thrpt:  [−4.3824% −0.7276% +3.0511%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f64/PhastFT DIT/65536
                        time:   [439.48 µs 443.02 µs 445.43 µs]
                        thrpt:  [147.13 Melem/s 147.93 Melem/s 149.12 Melem/s]
                        thrpt:  [2.1924 GiB/s 2.2043 GiB/s 2.2221 GiB/s]
                 change:
                        time:   [−5.8194% −2.8487% +0.2558%] (p = 0.08 > 0.05)
                        thrpt:  [−0.2552% +2.9323% +6.1789%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f64/RustFFT/65536
                        time:   [364.98 µs 367.61 µs 369.27 µs]
                        thrpt:  [177.48 Melem/s 178.28 Melem/s 179.56 Melem/s]
                        thrpt:  [2.6446 GiB/s 2.6565 GiB/s 2.6757 GiB/s]
                 change:
                        time:   [−3.8768% −0.8055% +2.1075%] (p = 0.61 > 0.05)
                        thrpt:  [−2.0640% +0.8120% +4.0332%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) low mild
Inverse f64/PhastFT DIT/131072
                        time:   [941.70 µs 952.94 µs 961.80 µs]
                        thrpt:  [136.28 Melem/s 137.54 Melem/s 139.19 Melem/s]
                        thrpt:  [2.0307 GiB/s 2.0496 GiB/s 2.0740 GiB/s]
                 change:
                        time:   [−9.0268% −4.0693% +0.3600%] (p = 0.11 > 0.05)
                        thrpt:  [−0.3587% +4.2419% +9.9225%]
                        No change in performance detected.
Inverse f64/RustFFT/131072
                        time:   [771.97 µs 776.40 µs 779.86 µs]
                        thrpt:  [168.07 Melem/s 168.82 Melem/s 169.79 Melem/s]
                        thrpt:  [2.5044 GiB/s 2.5156 GiB/s 2.5301 GiB/s]
                 change:
                        time:   [−10.338% −3.0347% +2.6789%] (p = 0.49 > 0.05)
                        thrpt:  [−2.6090% +3.1297% +11.530%]
                        No change in performance detected.
Found 4 outliers among 20 measurements (20.00%)
  2 (10.00%) low severe
  2 (10.00%) low mild
Inverse f64/PhastFT DIT/262144
                        time:   [2.0272 ms 2.0440 ms 2.0546 ms]
                        thrpt:  [127.59 Melem/s 128.25 Melem/s 129.31 Melem/s]
                        thrpt:  [1.9012 GiB/s 1.9110 GiB/s 1.9269 GiB/s]
                 change:
                        time:   [−4.3709% −1.5443% +1.4175%] (p = 0.32 > 0.05)
                        thrpt:  [−1.3977% +1.5685% +4.5706%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) low mild
Inverse f64/RustFFT/262144
                        time:   [1.7030 ms 1.7115 ms 1.7185 ms]
                        thrpt:  [152.54 Melem/s 153.16 Melem/s 153.93 Melem/s]
                        thrpt:  [2.2730 GiB/s 2.2823 GiB/s 2.2938 GiB/s]
                 change:
                        time:   [−2.3810% +0.2548% +3.2585%] (p = 0.86 > 0.05)
                        thrpt:  [−3.1557% −0.2541% +2.4391%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low severe
Inverse f64/PhastFT DIT/524288
                        time:   [4.4325 ms 4.4788 ms 4.5140 ms]
                        thrpt:  [116.15 Melem/s 117.06 Melem/s 118.28 Melem/s]
                        thrpt:  [1.7307 GiB/s 1.7443 GiB/s 1.7625 GiB/s]
                 change:
                        time:   [−5.2729% −2.2894% +0.7804%] (p = 0.16 > 0.05)
                        thrpt:  [−0.7744% +2.3430% +5.5664%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) low mild
Inverse f64/RustFFT/524288
                        time:   [3.6458 ms 3.6609 ms 3.6788 ms]
                        thrpt:  [142.52 Melem/s 143.21 Melem/s 143.80 Melem/s]
                        thrpt:  [2.1237 GiB/s 2.1340 GiB/s 2.1429 GiB/s]
                 change:
                        time:   [+0.0388% +1.0905% +2.2356%] (p = 0.06 > 0.05)
                        thrpt:  [−2.1867% −1.0788% −0.0388%]
                        No change in performance detected.
Found 6 outliers among 20 measurements (30.00%)
  2 (10.00%) low severe
  1 (5.00%) low mild
  2 (10.00%) high mild
  1 (5.00%) high severe
Inverse f64/PhastFT DIT/1048576
                        time:   [9.7798 ms 9.8639 ms 9.9224 ms]
                        thrpt:  [105.68 Melem/s 106.30 Melem/s 107.22 Melem/s]
                        thrpt:  [1.5747 GiB/s 1.5841 GiB/s 1.5977 GiB/s]
                 change:
                        time:   [−5.0831% −2.0806% +0.8607%] (p = 0.21 > 0.05)
                        thrpt:  [−0.8533% +2.1248% +5.3553%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low mild
Inverse f64/RustFFT/1048576
                        time:   [7.9859 ms 8.0172 ms 8.0528 ms]
                        thrpt:  [130.21 Melem/s 130.79 Melem/s 131.30 Melem/s]
                        thrpt:  [1.9403 GiB/s 1.9489 GiB/s 1.9566 GiB/s]
                 change:
                        time:   [−0.9873% −0.1894% +0.6230%] (p = 0.66 > 0.05)
                        thrpt:  [−0.6191% +0.1897% +0.9972%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  2 (10.00%) high mild
Benchmarking Inverse f64/PhastFT DIT/2097152: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 6.0s, enable flat sampling, or reduce sample count to 10.
Inverse f64/PhastFT DIT/2097152
                        time:   [22.423 ms 22.580 ms 22.706 ms]
                        thrpt:  [92.361 Melem/s 92.877 Melem/s 93.526 Melem/s]
                        thrpt:  [1.3763 GiB/s 1.3840 GiB/s 1.3937 GiB/s]
                 change:
                        time:   [−4.4515% −2.7032% −0.7173%] (p = 0.01 < 0.05)
                        thrpt:  [+0.7225% +2.7783% +4.6588%]
                        Change within noise threshold.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high severe
Benchmarking Inverse f64/RustFFT/2097152: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 5.0s, enable flat sampling, or reduce sample count to 10.
Inverse f64/RustFFT/2097152
                        time:   [17.951 ms 18.165 ms 18.312 ms]
                        thrpt:  [114.52 Melem/s 115.45 Melem/s 116.83 Melem/s]
                        thrpt:  [1.7065 GiB/s 1.7203 GiB/s 1.7409 GiB/s]
                 change:
                        time:   [−3.2526% −1.5057% −0.0507%] (p = 0.08 > 0.05)
                        thrpt:  [+0.0507% +1.5287% +3.3620%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/4194304
                        time:   [50.549 ms 50.904 ms 51.256 ms]
                        thrpt:  [81.830 Melem/s 82.396 Melem/s 82.974 Melem/s]
                        thrpt:  [1.2194 GiB/s 1.2278 GiB/s 1.2364 GiB/s]
                 change:
                        time:   [−0.4467% +0.6978% +1.7297%] (p = 0.23 > 0.05)
                        thrpt:  [−1.7003% −0.6930% +0.4487%]
                        No change in performance detected.
Found 6 outliers among 20 measurements (30.00%)
  4 (20.00%) low mild
  2 (10.00%) high mild
Inverse f64/RustFFT/4194304
                        time:   [39.991 ms 40.251 ms 40.511 ms]
                        thrpt:  [103.54 Melem/s 104.20 Melem/s 104.88 Melem/s]
                        thrpt:  [1.5428 GiB/s 1.5527 GiB/s 1.5628 GiB/s]
                 change:
                        time:   [+1.8026% +2.6178% +3.3784%] (p = 0.00 < 0.05)
                        thrpt:  [−3.2680% −2.5511% −1.7707%]
                        Performance has regressed.
Inverse f64/PhastFT DIT/8388608
                        time:   [105.81 ms 106.67 ms 107.59 ms]
                        thrpt:  [77.967 Melem/s 78.639 Melem/s 79.278 Melem/s]
                        thrpt:  [1.1618 GiB/s 1.1718 GiB/s 1.1813 GiB/s]
                 change:
                        time:   [+0.1588% +1.1456% +2.1239%] (p = 0.03 < 0.05)
                        thrpt:  [−2.0798% −1.1326% −0.1586%]
                        Change within noise threshold.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) high mild
Inverse f64/RustFFT/8388608
                        time:   [80.531 ms 81.139 ms 81.799 ms]
                        thrpt:  [102.55 Melem/s 103.39 Melem/s 104.17 Melem/s]
                        thrpt:  [1.5281 GiB/s 1.5406 GiB/s 1.5522 GiB/s]
                 change:
                        time:   [+0.7409% +1.6107% +2.5218%] (p = 0.00 < 0.05)
                        thrpt:  [−2.4598% −1.5852% −0.7354%]
                        Change within noise threshold.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Benchmarking Inverse f64/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 5.4s, or reduce sample count to 10.
Inverse f64/PhastFT DIT/16777216
                        time:   [217.90 ms 220.08 ms 222.38 ms]
                        thrpt:  [75.444 Melem/s 76.232 Melem/s 76.994 Melem/s]
                        thrpt:  [1.1242 GiB/s 1.1359 GiB/s 1.1473 GiB/s]
                 change:
                        time:   [−1.1650% −0.0002% +1.2748%] (p = 1.00 > 0.05)
                        thrpt:  [−1.2587% +0.0002% +1.1787%]
                        No change in performance detected.
Inverse f64/RustFFT/16777216
                        time:   [169.85 ms 170.73 ms 171.71 ms]
                        thrpt:  [97.708 Melem/s 98.270 Melem/s 98.777 Melem/s]
                        thrpt:  [1.4560 GiB/s 1.4643 GiB/s 1.4719 GiB/s]
                 change:
                        time:   [−0.1602% +0.4821% +1.1261%] (p = 0.17 > 0.05)
                        thrpt:  [−1.1136% −0.4798% +0.1605%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild

@smu160 smu160 marked this pull request as ready for review April 17, 2026 18:00
@Shnatsel
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Shnatsel commented Apr 17, 2026

Seems like a small improvement but maybe noise. Doesn't regress for sure

Forward f32/PhastFT DIT/64
                        time:   [105.27 ns 110.60 ns 113.66 ns]
                        thrpt:  [563.07 Melem/s 578.66 Melem/s 607.96 Melem/s]
                        thrpt:  [4.1952 GiB/s 4.3113 GiB/s 4.5296 GiB/s]
                 change:
                        time:   [−10.529% −5.2738% +0.4013%] (p = 0.08 > 0.05)
                        thrpt:  [−0.3997% +5.5674% +11.769%]
                        No change in performance detected.
Forward f32/PhastFT DIT/128
                        time:   [178.33 ns 188.68 ns 194.69 ns]
                        thrpt:  [657.44 Melem/s 678.41 Melem/s 717.79 Melem/s]
                        thrpt:  [4.8983 GiB/s 5.0545 GiB/s 5.3479 GiB/s]
                 change:
                        time:   [−9.4065% −3.2530% +3.7760%] (p = 0.36 > 0.05)
                        thrpt:  [−3.6386% +3.3624% +10.383%]
                        No change in performance detected.
Forward f32/PhastFT DIT/256
                        time:   [319.11 ns 338.64 ns 349.73 ns]
                        thrpt:  [731.99 Melem/s 755.97 Melem/s 802.22 Melem/s]
                        thrpt:  [5.4538 GiB/s 5.6324 GiB/s 5.9770 GiB/s]
                 change:
                        time:   [−8.9533% −1.8713% +5.6762%] (p = 0.63 > 0.05)
                        thrpt:  [−5.3714% +1.9069% +9.8338%]
                        No change in performance detected.
Forward f32/PhastFT DIT/512
                        time:   [632.22 ns 675.57 ns 700.00 ns]
                        thrpt:  [731.43 Melem/s 757.88 Melem/s 809.84 Melem/s]
                        thrpt:  [5.4495 GiB/s 5.6467 GiB/s 6.0338 GiB/s]
                 change:
                        time:   [−9.7190% −1.5221% +7.4845%] (p = 0.73 > 0.05)
                        thrpt:  [−6.9633% +1.5457% +10.765%]
                        No change in performance detected.
Forward f32/PhastFT DIT/1024
                        time:   [1.5119 µs 1.6416 µs 1.7157 µs]
                        thrpt:  [596.84 Melem/s 623.76 Melem/s 677.28 Melem/s]
                        thrpt:  [4.4468 GiB/s 4.6474 GiB/s 5.0462 GiB/s]
                 change:
                        time:   [−10.610% +1.2294% +14.313%] (p = 0.85 > 0.05)
                        thrpt:  [−12.521% −1.2145% +11.870%]
                        No change in performance detected.
Forward f32/PhastFT DIT/2048
                        time:   [3.2538 µs 3.5799 µs 3.7714 µs]
                        thrpt:  [543.04 Melem/s 572.09 Melem/s 629.42 Melem/s]
                        thrpt:  [4.0459 GiB/s 4.2624 GiB/s 4.6896 GiB/s]
                 change:
                        time:   [−11.843% +0.9028% +15.287%] (p = 0.89 > 0.05)
                        thrpt:  [−13.260% −0.8947% +13.433%]
                        No change in performance detected.
Forward f32/PhastFT DIT/4096
                        time:   [6.8302 µs 7.4484 µs 7.8092 µs]
                        thrpt:  [524.51 Melem/s 549.92 Melem/s 599.69 Melem/s]
                        thrpt:  [3.9079 GiB/s 4.0972 GiB/s 4.4680 GiB/s]
                 change:
                        time:   [−10.808% +0.6789% +13.504%] (p = 0.91 > 0.05)
                        thrpt:  [−11.897% −0.6743% +12.117%]
                        No change in performance detected.
Forward f32/PhastFT DIT/8192
                        time:   [14.184 µs 15.318 µs 15.982 µs]
                        thrpt:  [512.58 Melem/s 534.81 Melem/s 577.56 Melem/s]
                        thrpt:  [3.8190 GiB/s 3.9846 GiB/s 4.3031 GiB/s]
                 change:
                        time:   [−9.0964% +1.1956% +12.810%] (p = 0.83 > 0.05)
                        thrpt:  [−11.355% −1.1815% +10.007%]
                        No change in performance detected.
Forward f32/PhastFT DIT/16384
                        time:   [33.647 µs 35.859 µs 37.145 µs]
                        thrpt:  [441.08 Melem/s 456.91 Melem/s 486.94 Melem/s]
                        thrpt:  [3.2863 GiB/s 3.4042 GiB/s 3.6280 GiB/s]
                 change:
                        time:   [−5.9358% +1.8447% +10.114%] (p = 0.66 > 0.05)
                        thrpt:  [−9.1851% −1.8113% +6.3104%]
                        No change in performance detected.
Forward f32/PhastFT DIT/32768
                        time:   [69.818 µs 75.361 µs 78.674 µs]
                        thrpt:  [416.50 Melem/s 434.81 Melem/s 469.33 Melem/s]
                        thrpt:  [3.1032 GiB/s 3.2396 GiB/s 3.4968 GiB/s]
                 change:
                        time:   [−8.2072% +0.3083% +9.2415%] (p = 0.95 > 0.05)
                        thrpt:  [−8.4597% −0.3073% +8.9409%]
                        No change in performance detected.
Forward f32/PhastFT DIT/65536
                        time:   [127.70 µs 135.89 µs 140.56 µs]
                        thrpt:  [466.25 Melem/s 482.27 Melem/s 513.21 Melem/s]
                        thrpt:  [3.4738 GiB/s 3.5932 GiB/s 3.8237 GiB/s]
                 change:
                        time:   [−10.446% −3.6688% +3.4244%] (p = 0.34 > 0.05)
                        thrpt:  [−3.3110% +3.8086% +11.665%]
                        No change in performance detected.
Forward f32/PhastFT DIT/131072
                        time:   [222.05 µs 236.17 µs 243.92 µs]
                        thrpt:  [537.36 Melem/s 555.00 Melem/s 590.29 Melem/s]
                        thrpt:  [4.0037 GiB/s 4.1351 GiB/s 4.3980 GiB/s]
                 change:
                        time:   [−10.431% −0.9761% +9.3402%] (p = 0.85 > 0.05)
                        thrpt:  [−8.5423% +0.9857% +11.646%]
                        No change in performance detected.
Forward f32/PhastFT DIT/262144
                        time:   [420.44 µs 445.97 µs 460.01 µs]
                        thrpt:  [569.87 Melem/s 587.80 Melem/s 623.50 Melem/s]
                        thrpt:  [4.2458 GiB/s 4.3795 GiB/s 4.6454 GiB/s]
                 change:
                        time:   [−10.055% −0.8526% +9.3419%] (p = 0.87 > 0.05)
                        thrpt:  [−8.5437% +0.8599% +11.179%]
                        No change in performance detected.
Forward f32/PhastFT DIT/524288
                        time:   [844.79 µs 874.66 µs 891.31 µs]
                        thrpt:  [588.22 Melem/s 599.42 Melem/s 620.61 Melem/s]
                        thrpt:  [4.3826 GiB/s 4.4660 GiB/s 4.6239 GiB/s]
                 change:
                        time:   [−10.644% +0.0085% +12.446%] (p = 1.00 > 0.05)
                        thrpt:  [−11.069% −0.0085% +11.912%]
                        No change in performance detected.
Forward f32/PhastFT DIT/1048576
                        time:   [1.8279 ms 1.8708 ms 1.9009 ms]
                        thrpt:  [551.63 Melem/s 560.49 Melem/s 573.66 Melem/s]
                        thrpt:  [4.1099 GiB/s 4.1760 GiB/s 4.2741 GiB/s]
                 change:
                        time:   [−11.434% −1.7813% +9.3018%] (p = 0.73 > 0.05)
                        thrpt:  [−8.5102% +1.8136% +12.910%]
                        No change in performance detected.
Forward f32/PhastFT DIT/2097152
                        time:   [3.9793 ms 4.0358 ms 4.0940 ms]
                        thrpt:  [512.26 Melem/s 519.64 Melem/s 527.02 Melem/s]
                        thrpt:  [3.8166 GiB/s 3.8716 GiB/s 3.9266 GiB/s]
                 change:
                        time:   [−9.6296% +0.6791% +12.264%] (p = 0.90 > 0.05)
                        thrpt:  [−10.924% −0.6745% +10.656%]
                        No change in performance detected.
Found 5 outliers among 20 measurements (25.00%)
  5 (25.00%) low mild
Benchmarking Forward f32/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 7.6s, enable flat sampling, or reduce sample count to 10.
Forward f32/PhastFT DIT/4194304
                        time:   [8.8574 ms 8.9357 ms 9.0106 ms]
                        thrpt:  [465.49 Melem/s 469.39 Melem/s 473.54 Melem/s]
                        thrpt:  [3.4681 GiB/s 3.4972 GiB/s 3.5281 GiB/s]
                 change:
                        time:   [−4.7910% −1.2246% +2.2222%] (p = 0.54 > 0.05)
                        thrpt:  [−2.1739% +1.2398% +5.0321%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  1 (5.00%) low mild
  1 (5.00%) high severe
Forward f32/PhastFT DIT/8388608
                        time:   [22.850 ms 23.018 ms 23.198 ms]
                        thrpt:  [361.60 Melem/s 364.43 Melem/s 367.11 Melem/s]
                        thrpt:  [2.6942 GiB/s 2.7153 GiB/s 2.7352 GiB/s]
                 change:
                        time:   [−0.3485% +0.6181% +1.5569%] (p = 0.22 > 0.05)
                        thrpt:  [−1.5331% −0.6143% +0.3497%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Forward f32/PhastFT DIT/16777216
                        time:   [53.981 ms 54.265 ms 54.580 ms]
                        thrpt:  [307.39 Melem/s 309.17 Melem/s 310.80 Melem/s]
                        thrpt:  [2.2902 GiB/s 2.3035 GiB/s 2.3156 GiB/s]
                 change:
                        time:   [−8.3028% −7.2228% −6.0854%] (p = 0.00 < 0.05)
                        thrpt:  [+6.4797% +7.7851% +9.0546%]
                        Performance has improved.

Inverse f32/PhastFT DIT/64
                        time:   [110.01 ns 117.19 ns 122.02 ns]
                        thrpt:  [524.50 Melem/s 546.11 Melem/s 581.74 Melem/s]
                        thrpt:  [3.9078 GiB/s 4.0689 GiB/s 4.3343 GiB/s]
                 change:
                        time:   [−10.367% −6.1947% −2.2789%] (p = 0.01 < 0.05)
                        thrpt:  [+2.3320% +6.6038% +11.567%]
                        Performance has improved.
Found 5 outliers among 20 measurements (25.00%)
  5 (25.00%) high mild
Inverse f32/PhastFT DIT/128
                        time:   [183.96 ns 198.98 ns 209.16 ns]
                        thrpt:  [611.98 Melem/s 643.27 Melem/s 695.81 Melem/s]
                        thrpt:  [4.5596 GiB/s 4.7928 GiB/s 5.1842 GiB/s]
                 change:
                        time:   [−8.2455% −2.5484% +4.1173%] (p = 0.42 > 0.05)
                        thrpt:  [−3.9545% +2.6150% +8.9865%]
                        No change in performance detected.
Found 5 outliers among 20 measurements (25.00%)
  5 (25.00%) high mild
Inverse f32/PhastFT DIT/256
                        time:   [330.17 ns 356.05 ns 372.17 ns]
                        thrpt:  [687.86 Melem/s 719.00 Melem/s 775.35 Melem/s]
                        thrpt:  [5.1250 GiB/s 5.3570 GiB/s 5.7768 GiB/s]
                 change:
                        time:   [−8.6178% −1.9669% +4.2634%] (p = 0.57 > 0.05)
                        thrpt:  [−4.0891% +2.0064% +9.4305%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/512
                        time:   [728.88 ns 800.36 ns 847.22 ns]
                        thrpt:  [604.33 Melem/s 639.71 Melem/s 702.45 Melem/s]
                        thrpt:  [4.5026 GiB/s 4.7662 GiB/s 5.2336 GiB/s]
                 change:
                        time:   [−1.8055% +6.6791% +16.329%] (p = 0.17 > 0.05)
                        thrpt:  [−14.037% −6.2609% +1.8387%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/1024
                        time:   [1.5415 µs 1.7152 µs 1.8362 µs]
                        thrpt:  [557.68 Melem/s 597.03 Melem/s 664.28 Melem/s]
                        thrpt:  [4.1550 GiB/s 4.4482 GiB/s 4.9493 GiB/s]
                 change:
                        time:   [−9.7390% −0.7493% +10.026%] (p = 0.89 > 0.05)
                        thrpt:  [−9.1128% +0.7550% +10.790%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/2048
                        time:   [3.2959 µs 3.6615 µs 3.9153 µs]
                        thrpt:  [523.07 Melem/s 559.34 Melem/s 621.37 Melem/s]
                        thrpt:  [3.8972 GiB/s 4.1674 GiB/s 4.6296 GiB/s]
                 change:
                        time:   [−9.9660% −0.1279% +11.216%] (p = 0.98 > 0.05)
                        thrpt:  [−10.085% +0.1281% +11.069%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/4096
                        time:   [6.8429 µs 7.5486 µs 8.0353 µs]
                        thrpt:  [509.75 Melem/s 542.62 Melem/s 598.58 Melem/s]
                        thrpt:  [3.7980 GiB/s 4.0428 GiB/s 4.4597 GiB/s]
                 change:
                        time:   [−10.193% −0.7970% +10.143%] (p = 0.88 > 0.05)
                        thrpt:  [−9.2089% +0.8034% +11.349%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/8192
                        time:   [14.215 µs 15.461 µs 16.333 µs]
                        thrpt:  [501.57 Melem/s 529.84 Melem/s 576.27 Melem/s]
                        thrpt:  [3.7370 GiB/s 3.9476 GiB/s 4.2936 GiB/s]
                 change:
                        time:   [−8.7996% −0.4356% +8.5698%] (p = 0.92 > 0.05)
                        thrpt:  [−7.8934% +0.4375% +9.6486%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/16384
                        time:   [32.634 µs 35.153 µs 36.963 µs]
                        thrpt:  [443.26 Melem/s 466.07 Melem/s 502.05 Melem/s]
                        thrpt:  [3.3025 GiB/s 3.4725 GiB/s 3.7405 GiB/s]
                 change:
                        time:   [−7.7197% −1.9848% +4.2377%] (p = 0.53 > 0.05)
                        thrpt:  [−4.0654% +2.0250% +8.3655%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Inverse f32/PhastFT DIT/32768
                        time:   [68.115 µs 74.108 µs 78.436 µs]
                        thrpt:  [417.77 Melem/s 442.17 Melem/s 481.07 Melem/s]
                        thrpt:  [3.1126 GiB/s 3.2944 GiB/s 3.5842 GiB/s]
                 change:
                        time:   [−6.1479% −0.2081% +6.4329%] (p = 0.95 > 0.05)
                        thrpt:  [−6.0441% +0.2085% +6.5506%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) high mild
Inverse f32/PhastFT DIT/65536
                        time:   [128.01 µs 138.07 µs 145.54 µs]
                        thrpt:  [450.30 Melem/s 474.67 Melem/s 511.95 Melem/s]
                        thrpt:  [3.3550 GiB/s 3.5366 GiB/s 3.8143 GiB/s]
                 change:
                        time:   [−5.6247% +0.4250% +7.0684%] (p = 0.89 > 0.05)
                        thrpt:  [−6.6017% −0.4232% +5.9599%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/131072
                        time:   [225.96 µs 245.56 µs 257.99 µs]
                        thrpt:  [508.05 Melem/s 533.77 Melem/s 580.06 Melem/s]
                        thrpt:  [3.7853 GiB/s 3.9769 GiB/s 4.3218 GiB/s]
                 change:
                        time:   [−11.642% −4.1096% +4.0524%] (p = 0.32 > 0.05)
                        thrpt:  [−3.8945% +4.2857% +13.176%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/262144
                        time:   [425.21 µs 458.59 µs 478.35 µs]
                        thrpt:  [548.01 Melem/s 571.63 Melem/s 616.50 Melem/s]
                        thrpt:  [4.0830 GiB/s 4.2590 GiB/s 4.5933 GiB/s]
                 change:
                        time:   [−10.661% −3.0742% +5.1482%] (p = 0.48 > 0.05)
                        thrpt:  [−4.8961% +3.1717% +11.934%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/524288
                        time:   [819.08 µs 882.74 µs 921.03 µs]
                        thrpt:  [569.24 Melem/s 593.93 Melem/s 640.09 Melem/s]
                        thrpt:  [4.2412 GiB/s 4.4251 GiB/s 4.7691 GiB/s]
                 change:
                        time:   [−16.412% −6.4084% +3.8027%] (p = 0.24 > 0.05)
                        thrpt:  [−3.6634% +6.8472% +19.634%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/1048576
                        time:   [1.8215 ms 1.9116 ms 1.9599 ms]
                        thrpt:  [535.02 Melem/s 548.54 Melem/s 575.65 Melem/s]
                        thrpt:  [3.9862 GiB/s 4.0870 GiB/s 4.2889 GiB/s]
                 change:
                        time:   [−14.316% −5.7023% +4.1753%] (p = 0.25 > 0.05)
                        thrpt:  [−4.0079% +6.0472% +16.707%]
                        No change in performance detected.
Inverse f32/PhastFT DIT/2097152
                        time:   [4.2070 ms 4.2642 ms 4.3317 ms]
                        thrpt:  [484.14 Melem/s 491.81 Melem/s 498.49 Melem/s]
                        thrpt:  [3.6071 GiB/s 3.6643 GiB/s 3.7140 GiB/s]
                 change:
                        time:   [−11.671% −2.1890% +8.9465%] (p = 0.68 > 0.05)
                        thrpt:  [−8.2118% +2.2379% +13.213%]
                        No change in performance detected.
Found 5 outliers among 20 measurements (25.00%)
  5 (25.00%) low mild
Benchmarking Inverse f32/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 7.7s, enable flat sampling, or reduce sample count to 10.
Inverse f32/PhastFT DIT/4194304
                        time:   [9.5766 ms 9.6662 ms 9.7602 ms]
                        thrpt:  [429.73 Melem/s 433.91 Melem/s 437.98 Melem/s]
                        thrpt:  [3.2018 GiB/s 3.2329 GiB/s 3.2632 GiB/s]
                 change:
                        time:   [−7.5255% −4.3609% −1.3314%] (p = 0.01 < 0.05)
                        thrpt:  [+1.3494% +4.5597% +8.1380%]
                        Performance has improved.
Found 2 outliers among 20 measurements (10.00%)
  1 (5.00%) low mild
  1 (5.00%) high severe
Inverse f32/PhastFT DIT/8388608
                        time:   [24.806 ms 24.923 ms 25.044 ms]
                        thrpt:  [334.96 Melem/s 336.57 Melem/s 338.17 Melem/s]
                        thrpt:  [2.4956 GiB/s 2.5077 GiB/s 2.5196 GiB/s]
                 change:
                        time:   [−3.3570% −2.6878% −1.9007%] (p = 0.00 < 0.05)
                        thrpt:  [+1.9375% +2.7620% +3.4736%]
                        Performance has improved.
Inverse f32/PhastFT DIT/16777216
                        time:   [58.300 ms 58.642 ms 59.003 ms]
                        thrpt:  [284.34 Melem/s 286.10 Melem/s 287.77 Melem/s]
                        thrpt:  [2.1185 GiB/s 2.1316 GiB/s 2.1441 GiB/s]
                 change:
                        time:   [−17.040% −16.137% −15.216%] (p = 0.00 < 0.05)
                        thrpt:  [+17.946% +19.242% +20.540%]
                        Performance has improved.

Forward f64/PhastFT DIT/64
                        time:   [145.77 ns 156.71 ns 162.97 ns]
                        thrpt:  [392.72 Melem/s 408.41 Melem/s 439.04 Melem/s]
                        thrpt:  [5.8520 GiB/s 6.0858 GiB/s 6.5422 GiB/s]
                 change:
                        time:   [−9.9697% −1.0042% +8.7144%] (p = 0.84 > 0.05)
                        thrpt:  [−8.0159% +1.0144% +11.074%]
                        No change in performance detected.
Forward f64/PhastFT DIT/128
                        time:   [260.76 ns 281.74 ns 293.74 ns]
                        thrpt:  [435.76 Melem/s 454.31 Melem/s 490.88 Melem/s]
                        thrpt:  [6.4933 GiB/s 6.7698 GiB/s 7.3147 GiB/s]
                 change:
                        time:   [−11.727% −1.4644% +9.3682%] (p = 0.79 > 0.05)
                        thrpt:  [−8.5657% +1.4862% +13.285%]
                        No change in performance detected.
Forward f64/PhastFT DIT/256
                        time:   [556.40 ns 603.01 ns 629.52 ns]
                        thrpt:  [406.66 Melem/s 424.54 Melem/s 460.10 Melem/s]
                        thrpt:  [6.0597 GiB/s 6.3261 GiB/s 6.8561 GiB/s]
                 change:
                        time:   [−10.726% +0.2047% +13.325%] (p = 0.97 > 0.05)
                        thrpt:  [−11.758% −0.2043% +12.015%]
                        No change in performance detected.
Forward f64/PhastFT DIT/512
                        time:   [1.3274 µs 1.4704 µs 1.5559 µs]
                        thrpt:  [329.07 Melem/s 348.21 Melem/s 385.71 Melem/s]
                        thrpt:  [4.9035 GiB/s 5.1888 GiB/s 5.7475 GiB/s]
                 change:
                        time:   [−13.261% +1.1826% +17.384%] (p = 0.88 > 0.05)
                        thrpt:  [−14.810% −1.1688% +15.288%]
                        No change in performance detected.
Forward f64/PhastFT DIT/1024
                        time:   [2.8902 µs 3.1973 µs 3.3779 µs]
                        thrpt:  [303.15 Melem/s 320.27 Melem/s 354.30 Melem/s]
                        thrpt:  [4.5173 GiB/s 4.7724 GiB/s 5.2795 GiB/s]
                 change:
                        time:   [−12.443% +1.6781% +17.989%] (p = 0.83 > 0.05)
                        thrpt:  [−15.246% −1.6504% +14.211%]
                        No change in performance detected.
Forward f64/PhastFT DIT/2048
                        time:   [6.0778 µs 6.6955 µs 7.0502 µs]
                        thrpt:  [290.49 Melem/s 305.88 Melem/s 336.97 Melem/s]
                        thrpt:  [4.3286 GiB/s 4.5579 GiB/s 5.0212 GiB/s]
                 change:
                        time:   [−11.056% +2.5735% +17.994%] (p = 0.73 > 0.05)
                        thrpt:  [−15.250% −2.5089% +12.430%]
                        No change in performance detected.
Forward f64/PhastFT DIT/4096
                        time:   [12.947 µs 14.187 µs 14.915 µs]
                        thrpt:  [274.62 Melem/s 288.72 Melem/s 316.36 Melem/s]
                        thrpt:  [4.0921 GiB/s 4.3023 GiB/s 4.7141 GiB/s]
                 change:
                        time:   [−8.9237% +3.1126% +16.665%] (p = 0.64 > 0.05)
                        thrpt:  [−14.285% −3.0187% +9.7980%]
                        No change in performance detected.
Forward f64/PhastFT DIT/8192
                        time:   [27.909 µs 30.586 µs 32.208 µs]
                        thrpt:  [254.35 Melem/s 267.83 Melem/s 293.52 Melem/s]
                        thrpt:  [3.7901 GiB/s 3.9910 GiB/s 4.3738 GiB/s]
                 change:
                        time:   [−9.9286% +1.4388% +13.843%] (p = 0.82 > 0.05)
                        thrpt:  [−12.160% −1.4184% +11.023%]
                        No change in performance detected.
Forward f64/PhastFT DIT/16384
                        time:   [62.628 µs 67.762 µs 70.930 µs]
                        thrpt:  [230.99 Melem/s 241.79 Melem/s 261.61 Melem/s]
                        thrpt:  [3.4420 GiB/s 3.6029 GiB/s 3.8982 GiB/s]
                 change:
                        time:   [−7.3638% +2.4009% +13.246%] (p = 0.66 > 0.05)
                        thrpt:  [−11.697% −2.3446% +7.9492%]
                        No change in performance detected.
Forward f64/PhastFT DIT/32768
                        time:   [123.60 µs 134.60 µs 141.10 µs]
                        thrpt:  [232.23 Melem/s 243.45 Melem/s 265.12 Melem/s]
                        thrpt:  [3.4605 GiB/s 3.6276 GiB/s 3.9506 GiB/s]
                 change:
                        time:   [−9.6552% +0.6574% +12.306%] (p = 0.91 > 0.05)
                        thrpt:  [−10.958% −0.6531% +10.687%]
                        No change in performance detected.
Forward f64/PhastFT DIT/65536
                        time:   [203.34 µs 214.49 µs 220.85 µs]
                        thrpt:  [296.75 Melem/s 305.54 Melem/s 322.30 Melem/s]
                        thrpt:  [4.4219 GiB/s 4.5529 GiB/s 4.8026 GiB/s]
                 change:
                        time:   [−11.660% −3.5674% +5.5965%] (p = 0.43 > 0.05)
                        thrpt:  [−5.2999% +3.6994% +13.199%]
                        No change in performance detected.
Forward f64/PhastFT DIT/131072
                        time:   [421.27 µs 447.27 µs 462.42 µs]
                        thrpt:  [283.45 Melem/s 293.05 Melem/s 311.14 Melem/s]
                        thrpt:  [4.2237 GiB/s 4.3668 GiB/s 4.6363 GiB/s]
                 change:
                        time:   [−6.5153% +3.2493% +13.871%] (p = 0.54 > 0.05)
                        thrpt:  [−12.182% −3.1470% +6.9694%]
                        No change in performance detected.
Forward f64/PhastFT DIT/262144
                        time:   [802.18 µs 845.31 µs 869.07 µs]
                        thrpt:  [301.64 Melem/s 310.12 Melem/s 326.79 Melem/s]
                        thrpt:  [4.4947 GiB/s 4.6211 GiB/s 4.8696 GiB/s]
                 change:
                        time:   [−7.0254% +2.9396% +13.851%] (p = 0.58 > 0.05)
                        thrpt:  [−12.166% −2.8557% +7.5563%]
                        No change in performance detected.
Forward f64/PhastFT DIT/524288
                        time:   [1.7698 ms 1.8251 ms 1.8615 ms]
                        thrpt:  [281.64 Melem/s 287.27 Melem/s 296.24 Melem/s]
                        thrpt:  [4.1968 GiB/s 4.2806 GiB/s 4.4143 GiB/s]
                 change:
                        time:   [−9.6416% +0.0508% +11.454%] (p = 0.98 > 0.05)
                        thrpt:  [−10.277% −0.0508% +10.670%]
                        No change in performance detected.
Forward f64/PhastFT DIT/1048576
                        time:   [3.9503 ms 3.9981 ms 4.0615 ms]
                        thrpt:  [258.17 Melem/s 262.27 Melem/s 265.44 Melem/s]
                        thrpt:  [3.8471 GiB/s 3.9081 GiB/s 3.9554 GiB/s]
                 change:
                        time:   [−3.2307% +5.0936% +14.373%] (p = 0.27 > 0.05)
                        thrpt:  [−12.567% −4.8468% +3.3385%]
                        No change in performance detected.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) low severe
Benchmarking Forward f64/PhastFT DIT/2097152: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 6.7s, enable flat sampling, or reduce sample count to 10.
Forward f64/PhastFT DIT/2097152
                        time:   [8.8456 ms 8.9459 ms 9.0526 ms]
                        thrpt:  [231.66 Melem/s 234.43 Melem/s 237.09 Melem/s]
                        thrpt:  [3.4521 GiB/s 3.4932 GiB/s 3.5328 GiB/s]
                 change:
                        time:   [−3.9830% −0.6905% +2.1816%] (p = 0.70 > 0.05)
                        thrpt:  [−2.1350% +0.6953% +4.1482%]
                        No change in performance detected.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high severe
Forward f64/PhastFT DIT/4194304
                        time:   [23.242 ms 23.429 ms 23.636 ms]
                        thrpt:  [177.46 Melem/s 179.03 Melem/s 180.46 Melem/s]
                        thrpt:  [2.6443 GiB/s 2.6677 GiB/s 2.6891 GiB/s]
                 change:
                        time:   [+1.3789% +2.3968% +3.4432%] (p = 0.00 < 0.05)
                        thrpt:  [−3.3286% −2.3407% −1.3601%]
                        Performance has regressed.
Found 3 outliers among 20 measurements (15.00%)
  3 (15.00%) high mild
Forward f64/PhastFT DIT/8388608
                        time:   [54.038 ms 54.436 ms 54.823 ms]
                        thrpt:  [153.01 Melem/s 154.10 Melem/s 155.24 Melem/s]
                        thrpt:  [2.2801 GiB/s 2.2963 GiB/s 2.3132 GiB/s]
                 change:
                        time:   [−7.6718% −6.6677% −5.6896%] (p = 0.00 < 0.05)
                        thrpt:  [+6.0329% +7.1440% +8.3092%]
                        Performance has improved.
Benchmarking Forward f64/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 7.3s, or reduce sample count to 10.
Forward f64/PhastFT DIT/16777216
                        time:   [153.54 ms 155.09 ms 156.69 ms]
                        thrpt:  [107.08 Melem/s 108.18 Melem/s 109.27 Melem/s]
                        thrpt:  [1.5955 GiB/s 1.6120 GiB/s 1.6282 GiB/s]
                 change:
                        time:   [−0.1641% +1.2476% +2.6801%] (p = 0.11 > 0.05)
                        thrpt:  [−2.6102% −1.2323% +0.1643%]
                        No change in performance detected.

Inverse f64/PhastFT DIT/64
                        time:   [151.89 ns 166.70 ns 176.04 ns]
                        thrpt:  [363.54 Melem/s 383.92 Melem/s 421.35 Melem/s]
                        thrpt:  [5.4172 GiB/s 5.7208 GiB/s 6.2785 GiB/s]
                 change:
                        time:   [−10.020% −1.9487% +6.7788%] (p = 0.69 > 0.05)
                        thrpt:  [−6.3484% +1.9875% +11.136%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/128
                        time:   [266.87 ns 294.16 ns 311.19 ns]
                        thrpt:  [411.33 Melem/s 435.14 Melem/s 479.64 Melem/s]
                        thrpt:  [6.1292 GiB/s 6.4841 GiB/s 7.1472 GiB/s]
                 change:
                        time:   [−12.608% −3.6754% +6.0798%] (p = 0.47 > 0.05)
                        thrpt:  [−5.7313% +3.8156% +14.427%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/256
                        time:   [633.30 ns 708.12 ns 756.44 ns]
                        thrpt:  [338.43 Melem/s 361.52 Melem/s 404.23 Melem/s]
                        thrpt:  [5.0430 GiB/s 5.3871 GiB/s 6.0236 GiB/s]
                 change:
                        time:   [−3.8133% +8.6525% +22.458%] (p = 0.20 > 0.05)
                        thrpt:  [−18.339% −7.9634% +3.9645%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/512
                        time:   [1.4132 µs 1.5824 µs 1.6916 µs]
                        thrpt:  [302.66 Melem/s 323.57 Melem/s 362.30 Melem/s]
                        thrpt:  [4.5100 GiB/s 4.8215 GiB/s 5.3987 GiB/s]
                 change:
                        time:   [−10.695% +1.9082% +16.561%] (p = 0.79 > 0.05)
                        thrpt:  [−14.208% −1.8725% +11.976%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/1024
                        time:   [2.9295 µs 3.2533 µs 3.4664 µs]
                        thrpt:  [295.41 Melem/s 314.76 Melem/s 349.55 Melem/s]
                        thrpt:  [4.4019 GiB/s 4.6902 GiB/s 5.2087 GiB/s]
                 change:
                        time:   [−13.419% +0.0661% +14.355%] (p = 0.99 > 0.05)
                        thrpt:  [−12.553% −0.0661% +15.499%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/2048
                        time:   [6.2084 µs 6.8588 µs 7.2791 µs]
                        thrpt:  [281.35 Melem/s 298.59 Melem/s 329.88 Melem/s]
                        thrpt:  [4.1925 GiB/s 4.4494 GiB/s 4.9155 GiB/s]
                 change:
                        time:   [−11.439% +0.8338% +13.716%] (p = 0.89 > 0.05)
                        thrpt:  [−12.061% −0.8269% +12.916%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/4096
                        time:   [12.974 µs 14.250 µs 15.061 µs]
                        thrpt:  [271.96 Melem/s 287.45 Melem/s 315.71 Melem/s]
                        thrpt:  [4.0525 GiB/s 4.2833 GiB/s 4.7045 GiB/s]
                 change:
                        time:   [−9.6278% +0.9202% +13.062%] (p = 0.88 > 0.05)
                        thrpt:  [−11.553% −0.9118% +10.654%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/8192
                        time:   [28.326 µs 30.981 µs 32.857 µs]
                        thrpt:  [249.33 Melem/s 264.42 Melem/s 289.21 Melem/s]
                        thrpt:  [3.7152 GiB/s 3.9402 GiB/s 4.3095 GiB/s]
                 change:
                        time:   [−11.365% −2.4171% +8.1728%] (p = 0.65 > 0.05)
                        thrpt:  [−7.5553% +2.4769% +12.822%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/16384
                        time:   [63.342 µs 68.824 µs 72.717 µs]
                        thrpt:  [225.31 Melem/s 238.06 Melem/s 258.66 Melem/s]
                        thrpt:  [3.3574 GiB/s 3.5473 GiB/s 3.8543 GiB/s]
                 change:
                        time:   [−6.5148% +2.0345% +11.726%] (p = 0.67 > 0.05)
                        thrpt:  [−10.495% −1.9939% +6.9688%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/32768
                        time:   [124.15 µs 135.44 µs 143.67 µs]
                        thrpt:  [228.07 Melem/s 241.94 Melem/s 263.94 Melem/s]
                        thrpt:  [3.3986 GiB/s 3.6052 GiB/s 3.9331 GiB/s]
                 change:
                        time:   [−9.4109% −0.8223% +9.1336%] (p = 0.86 > 0.05)
                        thrpt:  [−8.3692% +0.8291% +10.389%]
                        No change in performance detected.
Found 4 outliers among 20 measurements (20.00%)
  4 (20.00%) high mild
Inverse f64/PhastFT DIT/65536
                        time:   [206.83 µs 224.16 µs 234.61 µs]
                        thrpt:  [279.34 Melem/s 292.36 Melem/s 316.85 Melem/s]
                        thrpt:  [4.1625 GiB/s 4.3565 GiB/s 4.7215 GiB/s]
                 change:
                        time:   [−9.9062% −0.6898% +9.6704%] (p = 0.89 > 0.05)
                        thrpt:  [−8.8177% +0.6946% +10.995%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/131072
                        time:   [415.57 µs 452.68 µs 475.96 µs]
                        thrpt:  [275.39 Melem/s 289.55 Melem/s 315.41 Melem/s]
                        thrpt:  [4.1036 GiB/s 4.3146 GiB/s 4.6999 GiB/s]
                 change:
                        time:   [−11.715% −2.9848% +6.4427%] (p = 0.55 > 0.05)
                        thrpt:  [−6.0527% +3.0766% +13.270%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/262144
                        time:   [799.46 µs 866.48 µs 907.56 µs]
                        thrpt:  [288.84 Melem/s 302.54 Melem/s 327.90 Melem/s]
                        thrpt:  [4.3041 GiB/s 4.5082 GiB/s 4.8861 GiB/s]
                 change:
                        time:   [−15.070% −4.7076% +5.5877%] (p = 0.41 > 0.05)
                        thrpt:  [−5.2920% +4.9402% +17.744%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/524288
                        time:   [1.7639 ms 1.8543 ms 1.9037 ms]
                        thrpt:  [275.40 Melem/s 282.75 Melem/s 297.23 Melem/s]
                        thrpt:  [4.1037 GiB/s 4.2133 GiB/s 4.4290 GiB/s]
                 change:
                        time:   [−13.348% −4.7703% +5.0639%] (p = 0.36 > 0.05)
                        thrpt:  [−4.8198% +5.0093% +15.404%]
                        No change in performance detected.
Inverse f64/PhastFT DIT/1048576
                        time:   [4.0432 ms 4.1013 ms 4.1539 ms]
                        thrpt:  [252.43 Melem/s 255.67 Melem/s 259.35 Melem/s]
                        thrpt:  [3.7615 GiB/s 3.8097 GiB/s 3.8646 GiB/s]
                 change:
                        time:   [−8.9144% −0.0854% +9.7000%] (p = 0.99 > 0.05)
                        thrpt:  [−8.8423% +0.0854% +9.7868%]
                        No change in performance detected.
Benchmarking Inverse f64/PhastFT DIT/2097152: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 6.8s, enable flat sampling, or reduce sample count to 10.
Inverse f64/PhastFT DIT/2097152
                        time:   [9.5177 ms 9.6025 ms 9.6803 ms]
                        thrpt:  [216.64 Melem/s 218.40 Melem/s 220.34 Melem/s]
                        thrpt:  [3.2282 GiB/s 3.2544 GiB/s 3.2834 GiB/s]
                 change:
                        time:   [−6.6331% −2.8469% +0.7353%] (p = 0.16 > 0.05)
                        thrpt:  [−0.7299% +2.9303% +7.1044%]
                        No change in performance detected.
Found 2 outliers among 20 measurements (10.00%)
  1 (5.00%) low severe
  1 (5.00%) high severe
Inverse f64/PhastFT DIT/4194304
                        time:   [24.998 ms 25.098 ms 25.204 ms]
                        thrpt:  [166.41 Melem/s 167.12 Melem/s 167.79 Melem/s]
                        thrpt:  [2.4798 GiB/s 2.4903 GiB/s 2.5002 GiB/s]
                 change:
                        time:   [−2.5679% −1.9847% −1.3747%] (p = 0.00 < 0.05)
                        thrpt:  [+1.3939% +2.0249% +2.6355%]
                        Performance has improved.
Found 1 outliers among 20 measurements (5.00%)
  1 (5.00%) high mild
Inverse f64/PhastFT DIT/8388608
                        time:   [59.012 ms 59.387 ms 59.782 ms]
                        thrpt:  [140.32 Melem/s 141.25 Melem/s 142.15 Melem/s]
                        thrpt:  [2.0909 GiB/s 2.1048 GiB/s 2.1182 GiB/s]
                 change:
                        time:   [−12.940% −12.110% −11.291%] (p = 0.00 < 0.05)
                        thrpt:  [+12.728% +13.779% +14.863%]
                        Performance has improved.
Benchmarking Inverse f64/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 20 samples in 5.0s. You may wish to increase target time to 7.7s, or reduce sample count to 10.
Inverse f64/PhastFT DIT/16777216
                        time:   [179.86 ms 181.68 ms 183.52 ms]
                        thrpt:  [91.418 Melem/s 92.345 Melem/s 93.280 Melem/s]
                        thrpt:  [1.3622 GiB/s 1.3760 GiB/s 1.3900 GiB/s]
                 change:
                        time:   [−1.8314% −0.5089% +0.8031%] (p = 0.48 > 0.05)
                        thrpt:  [−0.7967% +0.5115% +1.8656%]
                        No change in performance detected.

@Shnatsel Shnatsel merged commit 4d3d75d into main Apr 17, 2026
10 checks passed
@Shnatsel Shnatsel deleted the improve-inverse-transforms branch April 17, 2026 19:43
@smu160 smu160 mentioned this pull request Apr 17, 2026
Closed
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3 participants

@smu160 @codecov-commenter @Shnatsel