Performance
Proof lab
Core Web Vitals Fixture Lab
Controlled examples for performance/CWV reasoning, including layout, script, image, and rendering problems.
Stack
HTML, CSS, JavaScript, Lighthouse, performance diagnostics
Proof angle
Shows controlled debugging and performance explanation.
Overview
A controlled fixture set for performance reasoning and debugging. The point is to make layout, script, image, and render-blocking problems inspectable instead of vague.
Where this is relevant
Relevant for Core Web Vitals triage, Lighthouse interpretation, script/layout/image debugging, and performance QA.