[Webkit-unassigned] [Bug 235515] New: Browser hangs showing pixi.js examples

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=235515

            Bug ID: 235515
           Summary: Browser hangs showing pixi.js examples
           Product: WebKit
           Version: Safari 15
          Hardware: All
                OS: iOS 15
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: florent.masson at gmail.com
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

I had my game based on pixi.js (webgl) hang right from the start to the point it's unplayable. It was working fine on ios14. I now have ios 15.2.1 on my ipad air 2.

In an effort to reproduce the problem and find minimal reproduction cases, I tested all pixi.js examples.
When I open one of these pages, the browser hangs to the point I can't even refresh or click any example without waiting a lot. Often the browser does not even recover or the screen begins to flicker and I have to kill safari.

https://pixijs.io/examples/#/graphics/simple.js
https://pixijs.io/examples/#/graphics/advanced.js
https://pixijs.io/examples/#/graphics/dynamic.js
https://pixijs.io/examples/#/masks/graphics.js
https://pixijs.io/examples/#/events/logger.js
https://pixijs.io/examples/#/events/nested-boundary-with-projection.js
https://pixijs.io/examples/#/events/pointer-tracker.js
https://pixijs.io/examples/#/plugin-dragonbones/robot.js
https://pixijs.io/examples/#/plugin-dragonbones/eyetracking.js
https://pixijs.io/examples/#/plugin-projection/cards.js

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