Caching
Can I cache a built image rather than rebuilding?
Quick answer
Yes — push it to a registry tagged by content hash and pull it when the inputs are unchanged.
The detail that matters
This is faster than layer caching when the image rarely changes, and it makes the 'did anything change' check explicit.
Your next build could be twice as fast, at half the price
Start free. Migrating away is the same one line, and we publish that diff too.
Related
Why does Cargo rebuild everything?Your cache key changes on every run, or target/ is not cached at all.Why is cache restore slow?GitHub throttles cache bandwidth, so a multi-gigabyte cache can take minutes to restore.How do I write a good cache key?Hash exactly the files that determine the cached content — usually the lockfile — and nothing else.What are restore-keys?Ordered prefixes tried when the exact cache key misses, so a partial match can still be restored.