Is there a way to configure the JavaScriptCore options for iOS WKWebView (e.g. useOMGJIT)?

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Created Dec ’22

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We've published several WebGL games that run on iOS through a WKWebView, but the "OMG" JIT pass is causing us low framerates and poor thermals for the first few minutes the game is played, which is not ideal for applications in the mobile space. Worse, it's causing enough slowdown that voice chat is affected, which is a must have feature for us.

Is there any way to indicate how JavaScript should be used, i.e. setting the existing useOMGJIT variable to false? Our games are "fast enough" with BBQ JIT alone.

Thanks,

Joe

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Answer 1

PandaFedora OP

Dec ’22

For extra info, our games are WASM executables (generated by Unity) and although we've optimized them for size to the best of our ability, they're still greater than 15 MB. My guess is that the JIT compilation wasn't intended for executables of this size, or at least not tested at this size.

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