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blaze

Closed beta

Fast Rust CI. From the compiler up.

blaze is a Rust compiler and build system we wrote from scratch. It keeps your project compiled in memory and rebuilds only what a change touched, with no cargo or rustc underneath. We're bringing it to CI with a few teams at a time.

Apply for the beta How fast

Edit one function, then build · Linux x86-64

11× faster than cargo build, on average.

  1. ripgrep15.1.0 cargo 508 ms blaze 56 ms
  2. nushell0.108.0 cargo 1.25 s blaze 236 ms
  3. helix25.07.1 cargo 2.15 s blaze 116 ms
  4. bun1.25M lines of Rust cargo 9.11 s blaze 451 ms

24× on Linux aarch64 and 10× on macOS arm64, the geometric mean over real projects. These are blaze v1's numbers, warm against warm cargo on the same machine; v2 is not measured yet. Every project and how it's measured.

  • No cargo, no rustc

    blaze compiles every crate itself, on its own pinned Rust, whatever the project pins.

  • Only what changed

    A daemon keeps the project compiled in memory. After a change it recompiles the functions you touched and links again with its own linker.

  • Sandboxed

    Build scripts and proc macros always run in a sandbox. Proc macros run as WebAssembly.

  • Tested on real projects

    A release is stable once cargo, zed, servo, bun, Codex CLI and more build under it and pass their own test suites.

Apply for the beta.

Tell us what you build and where your CI hurts. We read every application and write back to the teams we can help first.

Application Four short steps. Every field is required.

  1. You

  2. Your CI

    The one your slowest pipeline runs on.

  3. What you build

    Pick every language your CI compiles.

  4. 0 / 4000
We use this only to reply about the beta.
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