Topic

DevTools Protocol & Tracing

How Chrome DevTools collects performance & memory traces, how to read flamecharts and timelines.

devtoolstracecdp

HTML

sample

<div class="trace">Trace viewer</div>

CSS

sample

.trace { border: 1px dashed #334155; }

JavaScript

sample

console.log('Tracing events flow over CDP domains')

Visualizer

DevTools Tracing

Record events and view a flame strip.

Visualizer

DevTools Tracing

Simulate a trace session and render a tiny flame chart.

live

Controls

CDP domains stream events; DevTools stitches them into lanes.

Visualization

Parse HTML

Layout

Why this matters

Connect the dots between specs (HTML, CSS, WebIDL) and engine behaviors (parser, layout, GPU). Use the sandbox to reproduce each step with your own snippets.