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Description
Environment
Description
If collecting a lot of profiling data, the profile-hermes
command will fail.
Reproducible Demo
- Launch a react-native app on Android
- Open developer menu.
- Start profiling
- Let it run sufficiently long (Not sure how many samples are required)
- Stop profiling
- Download the profile.
Example
$ npx react-native --verbose profile-hermes andytest/
warn Package rn-fetch-blob contains invalid configuration: "dependency.hooks" is not allowed. Please verify it's properly linked using "react-native config" command and contact the package maintainers about this.
info Downloading a Hermes Sampling Profiler from your Android device...
info No filename is provided, pulling latest file
info File to be pulled: sampling-profiler-trace954625215651537236.cpuprofile
debug Internal commands run to pull the file:
debug adb shell run-as org.understood.community cat cache/sampling-profiler-trace954625215651537236.cpuprofile > /var/folders/mx/m72jxsrd6_g8bw4xql0rb0140000gn/T/sampling-profiler-trace954625215651537236.cpuprofile
debug Getting source maps from Metro packager server
(node:36867) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)
debug Using source maps from Metro packager server
debug Successfully obtained the source map and stored it in /var/folders/mx/m72jxsrd6_g8bw4xql0rb0140000gn/T/index.map
error Invalid string length
RangeError: Invalid string length
at JSON.stringify (<anonymous>)
at downloadProfile (/Users/arahn/dev/understood/node_modules/@react-native-community/cli-hermes/build/profileHermes/downloadProfile.js:133:61)
at async Object.profileHermes [as func] (/Users/arahn/dev/understood/node_modules/@react-native-community/cli-hermes/build/profileHermes/index.js:21:5)