Latchkey Learn
Faster GitHub Actions
Why Actions workflows are slow and the changes that make them fast, with numbers: caching, parallelism, cold starts and Docker build speed.
Start here four stops, in order
Contents 4 sections · 27 entries
Caching 11 entries
actions/cache, Docker layers, per-ecosystem.
Parallelism 6 entries
Matrix, sharding, splitting suites.
Cold start and checkout 4 entries
Setup time, clones, runner size.
Docker build speed 6 entries
Layer cache, image size, buildx.
Explore other topics
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Runner failures Latchkey repairsOut of memory, disk full, rate limits, lost runners: reproduced and fixed.
GitHub Actions workflow errorsWorkflow, YAML, permissions and artifact errors, diagnosed and fixed.
Docker in CI: Registry, Build & RuntimeRegistry, runtime and build errors on CI runners.
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