
Field guide to the Chrome DevTools Performance panel
An interactive walkthrough of the waterfall, flame chart, LCP, CLS, INP, and the Insights panel.
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An interactive walkthrough of the waterfall, flame chart, LCP, CLS, INP, and the Insights panel.

Let AI agents see how your code actually renders in Safari, all running locally.

A CLI that controls Chrome through shell commands instead of Puppeteer or Playwright.

A practical checklist for spotting bottlenecks and validating fixes in real time.

A deep dive into how source maps link minified JavaScript back to original code.