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javascript - How to read FPS measurments in Mac 'Instruments' (Core Animation) while debuggin Mobile Safari on iPad comparing to Chrome Dev Tools FPS reading?

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I'm using Yosemite and OSX Xcode 'Instruments' (Core Animation) to measure FPS in my iPadMini Mobile Safari browser app. However, the reading I get looks contrary to the reading you get while using 'timeline' and Chrome Dev Tools. Please see the image from 'Inststruments':

and Dev Tools Timeline:

When you don't perform any action (fire no events) in Dev Tools you get 60fps+ (see the image above) and that what I would expect. However, in Mac 'Instruments' - Core Animation - in the same state you have ~7fps and FPS rate rises as soon as you start fiddling with the application (fire some events).

I'm confused and would appreciate any help.

javascript ios xcode ipad fps
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edited Feb 25 '15 at 10:30 asked Feb 18 '15 at 21:27 DamianS1987 109 1 2 8

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