Best way to performance test cross-plattform applications?

I want to make a performance comparison for a number of operation between different cross-plattform frameworks, namely React Native, NativeScript and Flutter.

At the moment I am looking what the easiest way to do this is on iOS and Android. I have tried to find good testing tools for this but couldn't really find anything so far. Because of this I wanted to know whether or not anyone knows any good tools for this or if this is something I have to do "manually" but taking the time it takes for the operations to run with something like Java's System.currentTimeMillis()?

My test results should look something like this in the end:

https://www.altexsoft.com/blog/engineering/performance-comparison-xamarin-forms-xamarin-ios-xamarin-android-vs-android-and-ios-native-applications/

Thanks for your help!