Library › Book 16 › Pipeline Optimization -- Caching, Parallelization, and Conditional Execution
Pipeline Optimization -- Caching, Parallelization, and Conditional Execution
6.1🔒Why Speed MattersSlow pipelines erode developer trust. When the pipeline takes 45 minutes, developers stop waiting for it and merge anyway. When the…
6.2🔒CachingCaching is the single most impactful optimization. Without caching, every pipeline run downloads and installs dependencies from scratch…
6.3🔒ParallelizationSplit your test suite across multiple runners. Each runner executes a fraction of the tests, and the total wall-clock time is roughly…
6.4🔒Fail-Fast StrategyThe fail-fast setting controls whether other matrix jobs are cancelled when one fails.
6.5🔒Conditional ExecutionSkip expensive work when it is not needed.
6.6🔒Pipeline Configuration for Test PerformanceEnvironment variables that affect test speed:
6.7🔒Measuring Pipeline PerformanceTrack these metrics to identify optimization opportunities:
6.8🔒Advanced Optimization TechniquesExtract common patterns into reusable workflows to avoid duplication across repositories:
6.9🔒Career Translation- Optimized CI pipeline from 42 minutes to under 14 minutes through dependency caching (npm, Playwright browsers), 4-shard test…
6.10🔒Q&AInterview Depth CheckPrompt: Your pipeline has a 92% cache hit rate but is still slow. The cache restore itself takes 45 seconds and the install step takes 10…