React Native UI profiling support

[mellow yacht]

I saw https://docs.sentry.io/platforms/react-native/profiling/#ui-profiling-experimental that ui profiling is available for React Native. However, it looks like the code that actually parses the profiling options in SentrySDKWrapper (https://github.com/getsentry/sentry-react-native/blob/9278c8ece7053ceeed5f04ba3601c0ce11a716a2/packages/core/ios/SentrySDKWrapper.m#L111) isn’t being called anymore. Is there still (experimental) support for UI profiling in the React native SDK?

[swift stirrup]

Thank you for reporting 🙇‍♂️ We are working to fix this.

[mellow yacht]

Do you have a rough estimate about when the fix might be ready?

[swift stirrup]

The fix should land in our next release. I'll follow-up on this thread when shipped. Thanks again for catching this 🙇‍♂️

[mellow yacht]

Thank you for fixing that! I can see the options are now being passed in SDK version 8.9.1. I'm not sure if I was trying to use the wrong profiling types, but I was ultimately trying to see the slow "UI frames" section as shown this screenshot: https://docs.sentry.io/product/explore/profiling/mobile-app-profiling/metrics/#gpu-information . I used the options for tracesSampleRate and _experiments from here: https://docs.sentry.io/platforms/react-native/profiling/#ui-profiling-experimental, but I don't see the UI frames section in any of my profiles

[swift stirrup]

Thank you for reporting. We will check this and iterate back.

[mellow yacht]

Thank you!

[swift stirrup]

Could you try the following configuration:

Sentry.init({
  dsn: "YOUR_DSN",
  tracesSampleRate: 1.0,
  _experiments: {
    profilingOptions: {
      profileSessionSampleRate: 1.0,
      lifecycle: "manual",
      startOnAppStart: true,
    },
  },
});

If it doesn't work can you share more on your setup and project to help us reproduce the issue?

[mellow yacht]

I tried testing on debug/release builds on iOS simulator and device and couldn't see any profiles show up using this config: https://gist.github.com/sleeper-ericc/01a6eccc81df8463b1f976b7d37e548a (I removed as much app-specific code as possible). I was only able to see profiles by setting profilesSampleRate = 1 and removing the profilingOptions section.

[swift stirrup]

Thank you for iterating on this

couldn't see any profiles show up using this config
Did you also try the lifecycle: "manual"?

[mellow yacht]

Yes, I also tried it with lifecycle: "manual"