gaqplanet.blogg.se - Android studio preview timed while rendering

You should see something something like this: In Google Chrome, open ++code>chrome://tracing/++/code> and click "Load" on the top left to load your trace file.You should now have a ++code>trace.html++/code> file created.Then press "enter" to stop the trace in the terminal.Then run ++code>python /path/to/systrace.py -o trace.html sched gfx view -a com.yourappid++/code> (replace ++code>/path/to++/code> by the proper path for your computer and ++code>com.yourappid++/code> by your app bundle id).

Connect an Android device or an emulator to your computer with your app installed (to test performance, it's usually best to take a low end device to aggravate any performance issues).It's a python script located in the ++code>platform-tools++/code> folder of your Android SDK (for me, with an Android Studio install on macOS, it's ++code>~/Library/Android/sdk/platform-tools/systrace/systrace.py++/code>). And for a native Android performance issue, a nice tool to use is Systrace. It's time to investigate what the problem is. Which means we definitely have some issues in our app! If you'd rather watch than read, you can also checkout the lightning talk I gave on the subject at React Summit 2021: If you see the UI thread going down a lot on Android, you're in the right place! I'll show you how I solved some issues in our app, using Systrace. If you see the JS thread going down a lot, checkout this great article by Louis to debug JS performance issues. If you're having performance issues in your app, one way to figure out if it's coming from the UI thread (so likely an issue on the native side) or the JS thread, you can simply use the Performance monitor, available out of the box in the development menu. JavaScript is driving the UI, so if it's not performing well, especially if it goes down to 0, your app will start to feel unresponsive. The UI thread should still run at 60fps, but you also want the JS thread to ideally not go under 60. In a React Native app, the UI is driven by the JS. Yes! But you also have to take into account the JS thread.

Is this also valid for a React Native app?

your frame rate should be constant and not drop.

there are less benefits in higher numbers.

60 is high enough for good perceived smoothness.

You want your app to run at 60fps (frames per second) to give an impression of smoothness. One of the key metrics to measure the performance of your app is the frame rate.