Perfecting Perf: Rapid, Rigorous and Reproducible Performance Experiments
summary
Claims that quick, reproducible perf experiments pay off and demonstrates them with concrete tools and numbers: uses Chrome DevTools and WebPageTest plus Lighthouse and PageSpeed Insights, captures HARs and runs them in a VM tool called Groundhog Day, edits HTML to inline critical CSS and flips protocols to simulate HTTP/2. Baseline first paint ~2.95s and visually complete ~5.19s; the inline-CSS experiment yields ~200 ms faster visually complete while not hurting first paint. The VM workflow is built and it works.
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chapters (11)
- 0:00Performance experimentation
- 1:03Page load performance
- 4:14Performance concepts
- 7:03Scientific method for tests
- 9:54Baseline metrics
- 15:30Performance goals
- 17:15Optimization opportunities
- 19:51Groundhog Day simulation
- 22:20Optimization results
- 24:03Iterating experiments
- 24:44Q&A
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