In Q3 2024, our global engineering org completed the largest CI/CD migration in our 15-year history: moving 10,214 active repositories from Jenkins 2.450 to GitLab CI 16.10 across 42 product teams, 3 cloud regions, and 2 on-prem data centers. We cut annual CI/CD operational costs by 42%, reduced pipeline failure rate by 68%, and eliminated 12,000+ hours of annual manual maintenance work. Here’s every benchmark, every mistake, and every line of code that got us there.

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Key Insights

Pipeline execution time dropped 37% on average for Java/Maven repos, from 14.2 minutes to 8.9 minutes per run with GitLab CI 16.10’s native caching.

Jenkins 2.450’s plugin sprawl caused 22% of all pipeline failures; GitLab…