[Webkit-unassigned] [Bug 211624] New: requestAnimationFrame slow performance vs. setInterval / setTimeout

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri May 8 08:02:49 PDT 2020


https://bugs.webkit.org/show_bug.cgi?id=211624

            Bug ID: 211624
           Summary: requestAnimationFrame slow performance vs. setInterval
                    / setTimeout
           Product: WebKit
           Version: Safari 13
          Hardware: All
                OS: Unspecified
            Status: NEW
          Severity: Major
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dustin.kerstein at gmail.com

I'm sure this can be replicated in other ways but here is an example using Three.js and video seeking using a file with 100% I-Frames - https://jsfiddle.net/wxe5pk8c - You can switch between requestAnimationFrame, Three.js's setAnimationLoop (which uses rAF internally), and setInterval by setting animationStrategy to 1,2,3, respectively. 

*Note* that as this JSFiddle uses iFrames, you'll need to click into the result iFrame to get Safari to avoid using its low power mode (meant for ads) which limits rendering to 30fps.

Below are average framerates from various devices I have tested:

1st Gen iPad Pro

   requestAnimationFrame: 55fps
   setAnimationLoop: 55fps
   setInterval: 60fps

2011 Macbook Pro

   requestAnimationFrame: 3fps
   setAnimationLoop: 3fps
   setInterval: 60fps

2019 Macbook Pro

   requestAnimationFrame: 60fps
   setAnimationLoop: 60fps
   setInterval: 60fps

Also, note that this JSFiddle example is susceptible to this issue - https://bugs.webkit.org/show_bug.cgi?id=211295 but I believe it should still be a valid test for comparison between requestAnimationFrame and setInterval / setTimeout performance testing.

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