sccache is a compiler cache wrapper and distributed compilation cache designed to store and reuse compilation results. It functions as a specialized caching solution for the Rust compiler, as well as a general tool to avoid redundant build cycles and reduce total build time.
The project distinguishes itself through a cloud-backed build cache and remote storage backends. It enables the synchronization of build artifacts across multiple machines or team members using distributed memory caches or cloud object storage.
Supported storage backends include local file systems, WebDAV, and a wide array of cloud providers such as S3-compatible storage, Azure Blob, Google Cloud Storage, Alibaba OSS, and Tencent Cloud COS. High-performance remote options include Redis and Memcached. The system also integrates with GitHub Actions for CI pipeline optimization and utilizes cloud identity authentication to secure access to remote storage.
The tool manages build acceleration through path normalization, hierarchical cache layering, and content-addressable hashing to ensure cache consistency across different environments.