argent-react-native-profiler

SKILL.md

This skill is complementary to argent-react-native-optimization, not a replacement for it.

2. Tool Overview

React Profiler (Hermes / React commits)

Tool
Purpose

react-profiler-start
Start CPU sampling + inject React commit-capture hook. Optional: sample_interval_us (default 100).

react-profiler-stop
Stop recording; stores cpuProfile + commitTree in session.

react-profiler-status
Call if you were interrupted in the middle of the flow, never in another scenario (debugger drop, Metro reload, pause, subagent handoff, any doubt). Returns session_status: "active" | "taken_over" | "stopped" | "no_react_runtime". Side-effect free.

react-profiler-analyze
Run pipeline -> report with CPU-enriched hot commits, sorted by totalRenderMs DESC. Saves raw data to disk.

react-profiler-component-source
AST lookup: file, line, memoization status, 50 lines of source for a component.

react-profiler-renders
Live fiber walk: render counts + durations per component (no profiling session required).

react-profiler-fiber-tree
Live fiber walk: full component hierarchy as JSON.

Drill-Down Query Tools (call after analyze)