react-profiler-stop
Stops the active CPU profiling session and collects CPU profile and React commit data. Returns a summary including duration, sample count, and fiber renders captured.
Instructions
Stop CPU profiling and collect the cpuProfile + React commit tree. Reads commit data from the in-app React DevTools backend. Stores results in the ReactProfilerSession for later use by react-profiler-analyze or react-profiler-cpu-summary. Call react-profiler-start first, then exercise the app, then call this. Returns { duration_ms, sample_count, fiber_renders_captured, total_react_commits, hot_commit_indices } summarizing the session. When any commit had fibers whose display name could not be resolved at stop time (typically transient components like modals/tooltips/animations that unmounted before stop), the response also includes { unattributed_ms, unattributed_fiber_count, unattributed_commit_count } — these quantify how much work is not accounted for in the per-component breakdown (the per-commit duration itself remains correct). Fails if no active profiling session exists or the CDP connection was lost during recording.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| port | No | Metro server port | |
| device_id | Yes | Device id from list-devices — the SAME id you passed to debugger-connect (iOS simulator UDID or Android serial). |