Speed Up & Optimize CI

Make pipelines faster, cheaper, and more reliable.

Actionable playbooks to speed up CI/CD: caching, parallelization, test splitting, Docker layer caching, and reliability patterns. Plus step-by-step how-tos for the things teams set up most.

Speed up CI

Caching, parallelism, test splitting, slim images.

Cache Rust/cargoCache Cargo registry, git deps, and the target directory in GitHub Actions so Rust CI stops recompiling the w… Speed up Docker buildsMake Docker image builds in CI fast: BuildKit layer caching, registry cache, multi-stage builds, ordering lay… Speed up GitHub ActionsMake GitHub Actions faster: caching, parallelization, test splitting, Docker layer caching, slimmer images, a… Speed up JestMake Jest fast in CI: tune workers, shard the suite, enable the Jest cache, and run only tests affected by th…

Diagnose CI

Why is my CI slow, expensive, or flaky.

Stuck on "queued"GitHub Actions jobs stuck on "queued" and not starting? The causes - outages, concurrency, runner labels, bil…

Explore other topics

GitHub ActionsWorkflow, runner, and YAML errors - diagnosed and fixed. Node.js & npmnpm, yarn, and pnpm failures in CI - solved. DockerBuild, run, compose, and registry errors - explained. Pythonpip, poetry, venv, and pytest failures - fixed. Java & JVMMaven, Gradle, and JVM failures in CI - resolved. GoGo build, module, and test failures - diagnosed.