feat(config): update default performance budgets

[chenjiahan]

Summary

Update the default performance budgets to 300 * 1024 for maxAssetSize and 500 * 1024 for maxEntrypointSize so the defaults better fit modern applications and distinguish asset vs entrypoint limits.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[cloudflare-workers-and-pages]

Deploying rspack with    Cloudflare Pages

Latest commit:	c3bd07b
Status:	✅  Deploy successful!
Preview URL:	https://5c93bad2.rspack-v2.pages.dev
Branch Preview URL:	https://chenjiahan-feat-performance.rspack-v2.pages.dev

View logs

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates Rspack’s default performance budget thresholds to better match modern bundle sizes, and ensures documentation/types/tests reflect the new defaults while keeping performance hint fixtures stable.

Changes:

• Updated default performance.maxAssetSize / maxEntrypointSize to 300 * 1024 and 500 * 1024.
• Refreshed surfaced defaults in English/Chinese docs and config type docs.
• Pinned explicit budgets in performance-related stats fixtures to keep warning/error behavior tests deterministic.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
website/docs/zh/config/performance.mdx	Updates displayed default values for performance budget options (ZH).
website/docs/en/config/performance.mdx	Updates displayed default values for performance budget options (EN).
tests/rspack-test/statsOutputCases/preset-normal-performance/rspack.config.js	Pins explicit budgets to keep performance warning fixture stable.
tests/rspack-test/statsOutputCases/preset-normal-performance-ensure-filter-sourcemaps/rspack.config.js	Pins explicit budgets to keep performance warning fixture stable (sourcemaps).
tests/rspack-test/statsOutputCases/performance-oversize-limit-error/rspack.config.js	Pins explicit budgets for the error-hints fixture.
tests/rspack-test/statsOutputCases/performance-no-hints/rspack.config.js	Pins explicit budgets for the no-hints fixture (avoid inheriting global defaults).
tests/rspack-test/statsOutputCases/performance-no-async-chunks-shown/rspack.config.js	Pins explicit budgets for async-chunk related output fixture.
tests/rspack-test/statsOutputCases/performance-error/rspack.config.js	Pins explicit budgets for the error-hints fixture.
tests/rspack-test/statsOutputCases/performance-different-mode-and-target/rspack.config.js	Pins explicit budgets across multiple target/mode configurations.
tests/rspack-test/defaultsCases/mode/undefined.js	Updates defaults snapshot to new computed budget values.
tests/rspack-test/defaultsCases/mode/production.js	Updates defaults snapshot to new computed budget values.
packages/rspack/src/config/types.ts	Updates documented defaults in the Performance type docs.
packages/rspack/src/config/defaults.ts	Implements the new default budget values in config defaults.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

📦 Binary Size-limit

Comparing f9f6be3 to fix(esm-library): deconflict module external helper names (#13695) by Fy

🎉 Size decreased by 7.72KB from 49.39MB to 49.39MB (⬇️0.02%)

[codspeed-hq]

Merging this PR will degrade performance by 4.44%

⚡ 1 improved benchmark
❌ 3 regressed benchmarks
✅ 24 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	rust@persistent_cache_restore_after_single_file_change@basic-react-development	27.8 ms	29.1 ms	-4.44%
❌	Simulation	bundle@basic-react-development	343.6 ms	347.1 ms	-1.01%
⚡	Simulation	rust@concatenate_module_code_generation	139.8 ms	137.6 ms	+1.58%
❌	Simulation	rust@persistent_cache_restore@basic-react-development	25.7 ms	26.8 ms	-4.32%

---

_{Comparing chenjiahan/feat-performance-budget-defaults (f9f6be3) with main (3d76b2b)}

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 6 projects in monorepo, 0 projects with changes.

📊 Quick Summary

Project	Total Size	Change
popular-libs	1.7 MB	0
react-10k	5.7 MB	0
react-1k	826.1 KB	0
react-5k	2.7 MB	0
rome	984.1 KB	0
ui-components	5.0 MB	0

Generated by Rsdoctor GitHub Action