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Profiling Phaser - GLES2ReadPixels


pyre
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Hi, I've been profiling my game using the chrome tracing tool and funnily the big slowdown seems to be GLES2ReadPixels. I ran a basic phaser animation example and experienced the same behaviour.

Why is this? I thought the readpixels command was generally thought of as quite a slow call (Especially if you cover your entire screen...) and only used for taking screenshots, etc?

Image: https://image.prntscr.com/image/Coz8zvP3Rtu4Qk26V58cHQ.png

Coz8zvP3Rtu4Qk26V58cHQ.png

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On 11/2/2017 at 6:13 AM, samme said:

Well, who knows what Chrome is doing with ReadPixels. :D Try the DevTools Performance tab instead.

I went for the tracing tool because the DevTools performance tab gives no info about what's causing the GPU usage to be so high.

nAjWP4_SRoe3giPKkNbuyA.png

The firefox canvas debugger is the only one that seems to give helpful information (I can see the number of draw calls and what each one of them does).

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