Rebuild Rust in milliseconds with blaze, a drop-in replacement for cargo that accelerates incremental compilation. By keeping projects compiled in memory and recompiling only changed functions, blaze achieves up to 92x faster rebuilds than standard cargo/rustc. On macOS ARM64, edits rebuild 10× faster; on Linux x86-64, up to 20× faster.
Projects like ripgrep, nushell, helix, and bun show rebuild times dropping from seconds to under 500 ms. The tool supports live edits, allowing running programs to adopt new code without restarts. Compatible with existing cargo commands, blaze runs alongside cargo and passes through all standard flags.
It uses its own Rust toolchain (nightly as of 2026-10-25) and works on macOS and Linux, with Windows builds falling back to cargo. Requires a few GB of memory for small projects. Designed for developers seeking rapid iteration, blaze integrates with CI and offers benchmarks, documentation, and community support.
Source: Hacker News · Summarized by HeadlinesBriefing