ios-ettrace-performance
iOS ETTrace Performance
Use this skill to capture a focused, symbolicated ETTrace profile from an iOS simulator app. Pair it with ../ios-debugger-agent/SKILL.md when the task also needs simulator build, install, launch, UI driving, logs, or screenshots.
Core Workflow
- Pick one focused flow and write down the expected start and stop points.
- Build the exact simulator app that will be installed and profiled.
- Temporarily link ETTrace into that app target for simulator/debug profiling.
- Collect UUID-matched dSYMs for the app executable and embedded dynamic frameworks.
- Capture one launch or runtime trace.
- Preserve the processed flamegraph JSON immediately after the run.
- Analyze only the processed JSON and report the flow, artifacts, hotspots, and caveats.
Avoid broad "use the app for a while" captures. One trace should correspond to one user-visible flow.
Setup
Use a writable run folder for each profiling session:
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