timer.md

Performance test - Timer

Test

The goal of this test is to see what is costly between setInterval every seconds, re-render without UI change and re-render with UI change.

The test are done without any Freeze and with Freeze (react-native-screen + manual freeze).

It is to see if setInterval without render is costly to explain why react-freeze doesn't improve performances on this test.

Results

There are no difference when enable freeze or not. setInterval doesn't take so much performances because the JS thread is still at 60 fps with 20 setInterval of 1 second.

Measures

Without Freeze	setInterval every seconds	re-render without UI change	re-render with UI change
Home
Tab 2
Screen 2

With Freeze	setInterval every seconds	re-render without UI change	re-render with UI change
Home
Tab 2
Screen 2