Developers Switch from ESLint to Rust-Based Biome for Faster AI-Assisted Coding

As AI coding tools like Claude Code and Codex generate large code patches instantly, slow linting tools have become a bottleneck in the development workflow. ESLint, built on Node.js, can take 15–30 seconds per run when type-aware rules are enabled, prompting many teams to quietly disable them. Biome, a linter and formatter written in Rust, uses a single built-in parser for both linting and formatting, eliminating the double-parse overhead of using ESLint alongside Prettier. According to Biome's own benchmarks, it formats code roughly 25 times faster than Prettier and lints around 15 times faster than ESLint on comparable rule sets, though these figures exclude type-aware rules that Biome does not support. Developers are advised to run benchmarks on their own codebases before migrating, as Biome offers around 250 rules compared to ESLint's 1,000-plus.