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GitHub Actions Caching Strategy

Cache by lock-file hash, restore by prefix. The cache key looks like npm-hashFiles(‘package-lock.json’) with restore key npm-.For matrix builds, include the OS and Node version in …

March 12, 2026 DevOps chris 1 min read Tooling

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Cache by lock-file hash, restore by prefix. The cache key looks like npm-hashFiles('package-lock.json') with restore key npm-.For matrix builds, include the OS and Node version in …

Cache by lock-file hash, restore by prefix. The cache key looks like npm-hashFiles('package-lock.json') with restore key npm-.

For matrix builds, include the OS and Node version in the key — caches are not portable across platforms.

Watch the size limit (10GB per repo). Old caches are evicted automatically, but cache thrash on huge artifacts costs minutes per run.

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