Yavaş pipeline'lar üretkenliği azaltır (geliştiriciler geri bildirim bekler) ve CI maliyetlerini artırır. Derleme ve test aşamalarını — önbellekleme, paralelleştirme, seçmeli yürütme ve doğru test stratejisi aracılığıyla — optimize etmek pipeline'ları hızlı tutarak, hızlı geri bildirim ve etkili kaynak kullanımı sağlar.
Neden önemli
Slow pipelines are costly:
→ developers WAIT for feedback (lost productivity, context switching)
→ slow CI discourages frequent integration (undermining CI's value)
→ longer pipelines = more compute cost (CI minutes)
→ Fast pipelines = fast feedback = productive, frequent integration.
Optimizasyon teknikleri
✓ CACHING — cache dependencies (node_modules, pip, Maven) between runs → don't
re-download/rebuild every time (often the biggest win)
✓ PARALLELIZATION — run independent jobs/tests in PARALLEL (not sequentially)
→ split the test suite across multiple parallel runners
✓ Build/test only what CHANGED — skip unaffected parts (incremental builds; monorepo
tools that detect affected projects)
✓ DOCKER layer caching — cache image layers; build dependencies before code
✓ FAIL FAST — run fast checks (lint, unit tests) FIRST → fail quickly on obvious issues
✓ Right-size RUNNERS; use efficient base images
