CPU Monitoring
Capture CPU usage of Android, iOS, Flutter, and React Native apps.
CPU usage is captured every 5 seconds while the app is in the foreground. Readings appear in the session replay.
CPU usage
A reading shows how much CPU the app is using. Sustained high usage drains the battery and heats up the device.
Android
Each reading is the average CPU usage since the previous one, across all cores: 100% means every core was fully busy. It's calculated from /proc/self/stat, where the OS records the clock ticks the process has spent on the CPU:
%CPU = 100 × ticks consumed / (clock tick rate × interval × number of cores)iOS
Each reading is the combined usage of all the app's non-idle threads, where 100% equals one fully busy core. On a device with multiple cores the value can go above 100%. The thread list comes from task_threads and each thread's usage from thread_info.
Flutter and React Native
Flutter and React Native apps don't collect CPU usage themselves. The native Android or iOS SDK collects it using the APIs described above.
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