Caching
Cache scope
Quick answer
Cache scope defines which workflows, branches and repositories may read a given cache entry.
Cache scope defines which workflows, branches and repositories may read a given cache entry.
Why it matters
GitHub scopes caches to a branch and its base, so a feature branch can read main's cache but not another feature branch's. That default surprises people debugging a cold cache.
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Related
Artifact cacheAn artifact cache stores build outputs between CI runs so that unchanged work does not have to be recomputed.Cache evictionCache eviction is the removal of cache entries to stay within a size limit, usually by discarding the least recently used entries first.Cache hit rateCache hit rate is the proportion of cache lookups that find a usable entry, expressed as a percentage.Cache keyA cache key is the string that identifies a cache entry, typically built from a hash of the lockfiles that determine the cached content.