Stripe details their selective test execution system that enables fast CI for their massive 50-million-line Ruby monorepo. The approach intelligently identifies and runs only tests affected by code changes, significantly reducing CI times while maintaining reliability. This represents a major engineering achievement in managing large-scale monorepo development.
Background
Large tech companies with massive monorepos face significant challenges in maintaining fast CI/CD pipelines as codebases grow to tens of millions of lines. Traditional approaches that run all tests become prohibitively slow.
- Source
- Lobsters
- Published
- Apr 10, 2026 at 10:31 PM
- Score
- 7.0 / 10