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Endigest AI Core Summary
Slack's DevXP team optimized their E2E testing pipeline by eliminating redundant frontend builds, reducing build times by 50% and build frequency by 60%.
•Frontend builds (~5 min) were triggered even when no frontend code changed, wasting time across hundreds of daily PRs
•Used `git diff` with 3-dot notation to detect frontend changes against main branch, skipping builds when unnecessary
•Reused prebuilt frontend assets from AWS S3 via an internal CDN when no frontend changes were detected
•Change detection and artifact lookup completed in under 3 seconds on average, even across 100,000+ tracked files
•Combined with a prior Webpack upgrade, average E2E pipeline build time dropped from ~10 minutes to ~2 minutes, saving terabytes of S3 storage monthly
This summary was automatically generated by AI based on the original article and may not be fully accurate.
Slack
Google Cloud
AWS