From slow to go: Rails test profiling hands-on

on YouTube ↗02h 05m

" summary

Workshop shows concrete steps and wins: run a sample of 100 examples with stackprof and verer to find boot and GC hotspots, turn off per-run coverage to cut load time ~15%, disable debugger and enable webpacker caching for another ~10% cut, and flip Sidekiq to fake to drop its share from ~25% to ~2–3% of run time. TestProf features used include TestProf toolbox event profiling, FactoryProf and LetItBe (halving some request specs from ~3.5s to ~1.5s), and an rspec stamp patches workflow that auto-inserts 13 quick fixes.

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" chapters (13)

1. 0:00Introduction
2. 1:04Why optimizing Rails tests matters
3. 8:52Profiling with stackprof and verer
4. 21:13Analyzing results and bottlenecks
5. 40:57Disabling coverage reports
6. 47:44Focusing test groups with testprof
7. 50:37Profiling sidekick and paperclip
8. 1:07:05Optimizing sidekick and paperclip
9. 1:21:49Factory profiling with FactoryProf
10. 1:31:27Fixing factory cascades
11. 1:40:08Faster setup with Let It Be
12. 1:48:03Profiling before/after hooks
13. 2:01:55Summary

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