The Unexpected Integration with Biome and ESBuild: Benchmark Biome and ESBuild are two of the most popular Rust-based tools in the modern frontend ecosystem: Biome as an all-in-one linter, formatter, and (experimentally) transpiler, ESBuild as a blazing fast bundler and transpiler. For years, teams have used them as separate steps in their pipelines: run Biome to lint and format code, then pass the cleaned code to ESBuild for bundling. But what happens when you integrate Biome directly into ESBuild's build pipeline? Our benchmarks reveal surprising, counterintuitive results. Benchmark Setup We tested three configuration tiers across three project sizes to isolate variables: Small project : 10 TypeScript files, 1,000 lines of code (LOC), no framework dependencies. Medium project : 50 TypeScript + React files, 10,000 LOC, 5 third-party dependencies. Large project : 200 TypeScript + React + GraphQL files, 50,000 LOC, 20 third-party dependencies.…