zccache review
A focused open-source cache for native builds and GitHub Actions workflows.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
zccache is an open-source compiler cache for C/C++, Rust, and Emscripten builds. It runs as a local daemon with low-overhead IPC, a filesystem watcher, and an in-memory file metadata cache. The product is aimed at developers working on native or Rust projects across Linux, macOS, and Windows, particularly teams using GitHub Actions for CI. Its cache coverage also includes clang-tidy and include-what-you-use results, giving it a useful role beyond compiler output alone.
The integration surface is a major strength for projects with established build tooling. zccache documents support for Ninja, CMake, Meson, Make, Cargo, setuptools-rust, maturin, and scikit-build-core. Its feature set covers C/C++ object and link artifacts, Rust rustc and Cargo check/build workflows, Emscripten emcc/em++ and wasm-ld, plus a multi-file compilation fast path. Cross-worktree cache sharing through path remapping is relevant for repositories where developers maintain multiple worktrees. Installation is available through GitHub Releases, PyPI, and crates.io, while the composite GitHub Actions integration connects CI workflows to the GitHub Actions Cache backend.
Choose zccache when local-first caching, open-source distribution, and broad build-system coverage matter more than a hosted execution layer. The persistent daemon and local filesystem backend suit developers who want cache reuse on their own machines, while the GitHub Actions backend extends that model into CI. It is less suitable for organizations seeking distributed remote build execution or CI coverage beyond GitHub Actions. Teams outside its C/C++, Rust, Emscripten, and related analysis-tool focus should also look for a cache product aligned with their languages and build environment.
zccache pros and cons
- Where it wins
- Caches C/C++, Rust, Emscripten, and analysis-tool results
- Supports Ninja, CMake, Meson, Make, Cargo, and Python build tools
- Combines local filesystem and GitHub Actions Cache backends
- Where it doesn't
- GitHub Actions is the only listed CI platform
- Does not provide remote build execution
- Its scope centers on C, C++, Rust, Emscripten, and related tools
zccache fact sheet, pricing and score →
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