argent-native-profiler
1. Tools
native-profiler-start— start profiling on a booted device. iOS: xctrace recording for CPU, hangs, and leaks.native-profiler-stop— stop the profiler and export trace data to timestamped XML files.native-profiler-analyze— parse exported trace data and return a structured bottleneck payload.profiler-stack-query— drill into parsed data: hang stacks, function callers, thread breakdown, leak details.profiler-load— list and reload previous trace sessions from disk for re-investigation.
2. Platform Support
- iOS: Fully supported. Backend: Xcode Instruments via
xctraceon a booted simulator or connected device. Requires Xcode command-line tools on PATH. - Android: Not yet implemented. An Android backend (Perfetto or simpleperf via
adb) is planned; todaynative-profiler-startrejects Android serials with a clear "iOS-only for now" error.
3. Investigation Patterns
More from software-mansion/argent
argent-test-ui-flow
Autonomously test an app UI (iOS or Android) by running interact-screenshot-verify loops using argent MCP tools. Use when testing a UI flow, verifying login works, testing navigation, or running an end-to-end UI test scenario.
9argent-create-flow
Record a reusable flow (scripted sequence of MCP tool calls) that can be replayed later with a single command. Use when the user asks to create, record, or build a flow, or to script a sequence of simulator actions.
9argent-metro-debugger
Debug a React Native app via Metro CDP using argent debugger tools. Use when connecting to Metro, inspecting React components, reading console logs, or evaluating JavaScript in the app runtime.
9argent-react-native-app-workflow
Step-by-step workflows for developing or debugging React Native apps on iOS simulator or Android emulator. Use when starting the app, debugging Metro, fixing builds, diagnosing runtime errors, or running tests.
9argent-react-native-profiler
Profile a React Native Hermes app to measure re-render and CPU performance using argent profiler tools. Use when optimizing for performance, measuring before/after a fix, spotting slow components, diagnosing re-renders, checking CPU hotspots, or producing a ranked issue report.
9argent-react-native-optimization
Optimizes a React Native app by profiling first to find real bottlenecks, then sweeping for mechanical issues. Entry-point for all performance work. Use when the app feels slow, user asks to optimize, fix re-renders, reduce jank, or improve startup. Delegates to argent-react-native-profiler for measurement.
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