References — bi-15 Cross-Layer Vertical Traces

Primary sources first. In-tree Chromium docs beat any external source, including these modules.

This module has no new subsystem of its own — it traces one operation through every layer already studied. The references are therefore the tools, plus the modules being connected.

Tools

• Perfetto — cross-process, cross-thread traces; the only way to see a full vertical slice
• chrome://tracing categories — enabling blink, cc, v8, devtools.timeline
• DevTools Performance panel — the application-level view of the same events
• Life of a Pixel — the narrative version of the trace you are about to capture

The layers being traced

Application-level counterparts

• fe-01 — Execution model (sibling project) — the same pipeline, measured from JavaScript
• fe-05 — CSS invalidation (sibling project) — style and layout cost, measured
• fe-06 — Layout (sibling project)

When a claim here proves stale, record it in PROGRESS.md section 7.