[iOS Performance issue]"Framemove " Taking too much execution time

Cocos Creator
1

Hello all,

We are experiencing significant performance issues on iOS devices, with poor FPS and high battery consumption. Upon profiling, we discovered the following:

  • The frameMove function consumes about 25% to 50% of the total execution time.
  • Handling of touch events accounts for significant execution time.

Additionally, we came across few older discussion on the Cocos forum
(Android build rendering options for performance - #13 by zhangxm,
[IOS Game Overheating Issue]) that highlights similar performance concerns. We are curious to know if any performance improvements have been made since then, particularly for iOS builds.

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Also while profiling our Cocos Creator project in Xcode, we identified a performance bottleneck in Builtins_InterpreterEntryTrampoline.

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These issues are likely from iOS’s restriction on Just-In-Time (JIT) compilation, leading to slower JavaScript execution compared to platforms that allow JIT (such as Android).

Also curious to know how much of a performance difference can be expected with JIT enabled versus without it.

Any suggestions about optimisations or workarounds to improve the performance would be appreciated.
@zhangxm @mr.kylin @pandamicro
Thank you in advance!

2

Since iOS could not enable JIT for testing, so we could not measure how much of a performance difference on iOS.
But you could compare them on Android by adding --jitless boot flag in cocos/bindings/jswrapper/v8/ScriptEngine.cpp for Android.

        #if (CC_PLATFORM == CC_PLATFORM_IOS) // Modify this line.
        flags.append(" --jitless");
        #endif
        if (!flags.empty()) {
            v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.length()));
        }