![]() ![]() For that, we'll be using a standard Android profiling tool called systrace. The first step for debugging this jank is to answer the fundamental question of where your time is being spent during each 16ms frame. But sometimes, there are things you can improve - and many times it's not native code's fault at all! Profiling Android UI Performance with systrace Īndroid supports 10k+ different phones and is generalized to support software rendering: the framework architecture and need to generalize across many hardware targets unfortunately means you get less for free relative to iOS. To view more details in tabular format, click at the Bottom Up tab below and then select DedicatedWorker Thread at the top left menu. A flame graph will appear under User Timing. Run the profiler under Chrome's Performance tab. This won't give you accurate results as the code is running in Chrome but will give you a general idea of where bottlenecks might be. Access it by selecting Perf Monitor from the Debug menu.įor iOS, Instruments is an invaluable tool, and on Android you should learn to use systrace.īut first, make sure that Development Mode is OFF! You should see _DEV_ = false, development-level warning are OFF, performance optimizations are ON in your application logs.Īnother way to profile JavaScript is to use the Chrome profiler while debugging. Use the built-in profiler to get detailed information about work done in the JavaScript thread and main thread side-by-side.
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