How Our CI/CD Pipeline Evolved from 45 Minutes to 8 Minutes
The story of optimizing our continuous integration pipeline through parallelization, caching, and smarter test selection.
A slow CI pipeline is a tax on every engineer, every pull request, every day. When our pipeline hit 45 minutes, we declared war on build times.
What We Changed
- Parallelized test suites across multiple runners
- Docker layer caching to avoid rebuilding unchanged dependencies
- Affected-only testing — only run tests related to changed code
- Moved linting and type-checking to pre-commit hooks
- Replaced heavy integration tests with contract tests where possible
- Incremental builds using turborepo for our monorepo
Results
Pipeline time dropped from 45 minutes to 8 minutes. Developer satisfaction scores on internal surveys jumped 30 points. And we ship 40 percent more PRs per week.
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