Native platforms emit .wasm/.mem.bin assets which are unused. about cocos-engine HOT 9 OPEN

@LuoLuoDev

As above, I wonder that iOS native supports wasm ?

No. V8 wasm depends on JIT enabled.

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https://groups.google.com/g/v8-reviews/c/2q_SKUw5ufk/m/e6QOej87AAAJ

As above, I wonder that iOS native supports wasm ? @dumganhar

from cocos-engine.

As we known, V8 in ios platform does not have jit and wasm is not supported either. We found that with the complexity of business logic, the execution efficiency of js on the iOS platform is also significantly reduced. We have compiled the v8 engine(version 9.1.269 at cocos engine 3.7.2) . And use instrument to view cpu consumption with jit compiled version and jitless compiled version.

I found that it costs much more cpu in jitless version than jit version. Can you give us some suggestions to improve performance degradation caused by V8 engine not having jit. @dumganhar @jareguo @minggo

from cocos-engine.

There is not a good way to fix the jitless issue. If possible, you can implement these codes in c++, and used in javascript.

from cocos-engine.

There is not a good way to fix the jitless issue. If possible, you can implement these codes in c++, and used in javascript.

@minggo Thank you for your professional reply, but I think our business logic is not particularly complex, but the CPU peak is still quite high, accompanied by frame drops and heat generation.
After research, I learned that currently only Apple's own WKWebview has JIT capabilities on the iOS platform. Although WKWebview is not a js runtime environment, js code can be executed through the evaluateJavaScript interface. I would like to ask whether cocos engine could replace the V8 engine on the iOS platform. Is it feasible to explain js programs for WKWebview? I think it is a big project. I would like to know if this is done, is there any other big resistance in cocos?

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As i know, WKWebview uses jscore which is jit enabled, as WKWebview is implemented by apple. Other apps can use jscore too, but it is jit disabled. cocos supported jscore in early versions, but its performance is bad than v8 core. So cocos uses v8 for all platforms.

from cocos-engine.

As i know, WKWebview uses jscore which is jit enabled, as WKWebview is implemented by apple. Other apps can use jscore too, but it is jit disabled. cocos supported jscore in early versions, but its performance is bad than v8 core. So cocos uses v8 for all platforms.

Thanks for your detailed answer, @minggo. Yes, I agree with what you said. In addition, I am wondering if there is a way to combine cocos engine and WKWebview, such as using the evaluateJavaScript interface to execute js code and use XMLHttpRequest to communicate with native to allow iOS cocos engine to use jit optimization ?

from cocos-engine.

As i know, WKWebview uses jscore which is jit enabled, as WKWebview is implemented by apple. Other apps can use jscore too, but it is jit disabled. cocos supported jscore in early versions, but its performance is bad than v8 core. So cocos uses v8 for all platforms.

Thanks for your detailed answer. Yes, I agree with what you said. In addition, I am wondering if there is a way to combine cocos engine and WKWebview, such as using the evaluateJavaScript interface to execute js code and use XMLHttpRequest to communicate with native to allow iOS cocos engine to use jit optimization ? how about this idea? Is it feasible from a technical perspective in cocos creator engine? @minggo @jareguo

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If you want to use WKWebview, then you can just export the program as a web app which can run in WKWebView. But it turns to be a web game. I don't think WKWebview can communicate with cocos engine.

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