Mixed benchmark fixups (#900)

* Mixed benchmarks: don't reshape on every iteration

* Fixup just bench command

Author: nicoburns

benches/benches/mixed.rs

@@ -17,6 +17,7 @@ impl CosmicTextContext {
         let mut buffer = Buffer::new_empty(metrics);
         buffer.set_size(font_system, None, None);
         buffer.set_text(font_system, text, attrs, Shaping::Advanced);
+        buffer.shape_until_scroll(font_system, false);
         Self { buffer }
     }
 
@@ -33,8 +34,6 @@ impl CosmicTextContext {
         });
         self.buffer.set_size(font_system, width_constraint, None);
 
-        self.buffer.shape_until_scroll(font_system, false);
-
         let (width, total_lines) = self
             .buffer
             .layout_runs()

justfile

@@ -7,8 +7,9 @@ import-yoga-tests:
 format-fixtures:
   cargo run --package format-fixtures --
 
+[working-directory: 'benches']
 bench *ARGS:
-  cargo bench --package taffy_benchmarks {{ARGS}}
+  cargo bench {{ARGS}}
 
 clippy:
   cargo +nightly clippy --workspace