In mobile mode, it take a long time to render the first frame.(about 7s) [bad] With same model file: if I change engine.disableUniformBuffers value to true manually after I create my engine, it perform good.(about 1s) [image] [good] Chrome: 113.0.5672.126 Os: MacBook Pro, Apple M2

This is probably because of this bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1267322&q=getUniformBlockIndex&can=2 However, we should detect Mac OS + Chrome and disable uniform buffers in that case. What can you see when you type navigator.userAgent in the console of the browser?

@ling can you try to force the Metal backend ? cause it should even be the default now ? I wonder why you still encounter this behavior ? Also Chrome Macos is meant to disable UBO usage here Babylon.js/thinEngine.ts at 4d15c1520687524381d760471f39233cab6daae7 · BabylonJS/Babylon.js · GitHub this i…

`engine.disableUniformBuffers` is set to false in mobile mode, and cause a bad performance

Bugs

sebavan May 30, 2023, 8:42pm 4

Let me close as a dupplicate of Babylonjs takes longer to render the first frame on mobile compared to Threejs - #8 by sebavan

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`engine.disableUniformBuffers` is set to false in mobile mode, and cause a bad performance

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