I had been using nested views in one of the screens in my android app. Now that I have removed all of them and used a ConstraintLayout for performance gains, I want to measure how much the performance has increased. Is there a way to measure the performance gain?
How to measure the layout performance in android?
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The easiest way is probably just to profile the app using a profiler using the old code and the new and see how much inclusive time is spent in onLayout in both versions.
Expect the difference to be less dramatic than you expect. The reality is your main thread is going to be idle most of the time, improving layout efficiency is really rarely a big factor in your app's performance. I would never refactor a nested design for that, I'd refactor a nested design if using constraint layout gave me cleaner XML for my view. Also remember that depending on what features you use, constraint view may not be faster. Its quicker to layout a nested linear layout than it is to calculate a whole bunch of constraints on multiple inner views, for example.