Authoring Benchmarks

Create browser benchmarks that answer a specific performance question. Browser behavior is the product behavior, so Chromium is the default runtime for component and utility benchmarks.

Required Context

Before changing benchmarks:

1. Read the testing overview.
2. Read the Bench section of the Vite internals documentation.
3. Read the target project's DEVELOPMENT.md.
4. Inspect the implementation, its unit tests, and the closest existing benchmark.

Use the guidance-build skill as well when adding or changing Wireit tasks. Use the audit-ci skill instead when measuring pnpm run ci, build orchestration, or the CI completion path.

Choose the Correct Performance Test