zccache

Spec sheet

Purpose

zccache is a local-first compiler cache for C/C++ and Rust, described as a drop-in replacement for sccache and ccache.Read 8 Oct 2026 · github.com

Platforms

The README lists Linux, macOS, and Windows binaries, including Linux aarch64, Apple Silicon, and Windows arm64 release archives.Read 8 Oct 2026 · github.com

License

The repository identifies its license as AGPL-3.0.Read 8 Oct 2026 · github.com

Headquarters

San Francisco, United StatesRead 28 Sep 2026 · github.com

Build integrations

It documents integration with Ninja, CMake, Meson, Make, Cargo through RUSTC_WRAPPER, and Python build tools including maturin.Read 8 Oct 2026 · github.com

Cache architecture

It uses a persistent daemon, filesystem watching, and in-memory file metadata to speed up cache lookups.Read 7 Oct 2026 · github.com

Cache design

It uses a persistent daemon, filesystem watching, and in-memory file metadata to speed up cache lookups.Read 8 Oct 2026 · github.com

Cache limits

The default artifact budget is 5% of filesystem capacity, clamped to 40–200 GiB, with configurable size overrides and LRU eviction.Read 8 Oct 2026 · github.com

Cache retention

The daemon manages cache retention, with a default artifact budget of 5% of filesystem capacity clamped to 40–200 GiB, subject to free-space adjustments.Read 7 Oct 2026 · github.com

CI integration

The project provides a composite GitHub Action with compilation and Cargo registry caching, plus optional target snapshots and cache warming.Read 8 Oct 2026 · github.com

GitHub Actions

The project provides a composite GitHub Action with compilation and Cargo registry cache layers, plus an optional target snapshot cache.Read 7 Oct 2026 · github.com

Installation

The README provides shell and PowerShell installers, platform-specific release archives, PyPI wheels, and crates.io packages.Read 7 Oct 2026 · github.com

Known coverage limit

The feature matrix marks CUDA/nvcc unsupported and MSVC cl.exe/link.exe support as partial.Read 7 Oct 2026 · github.com

Maintenance and support

The repository exposes GitHub Issues and Pull Requests for project discussion and contributions.Read 8 Oct 2026 · github.com

Storage

The feature comparison lists local filesystem storage and GitHub Actions Cache support, but marks S3, Google Cloud Storage, Redis, Memcached, Azure Blob, and distributed build farms unsupported.Read 8 Oct 2026 · github.com

Supported tools

The README lists support for Emscripten, wasm-ld, clang-tidy, include-what-you-use, rustfmt, and clippy.Read 8 Oct 2026 · github.com

Target snapshot limit

In the GitHub Action, target snapshot caching is disabled by default and its default maximum snapshot size is 2GiB.Read 7 Oct 2026 · github.com

Windows helper

A Defender exclusion helper can check, add, or remove an exclusion for the cache directory; adding one requires elevated privileges.Read 8 Oct 2026 · github.com

Where Specifiction places it

• Build Cache Software#22 of 236.8