:mutating the [[Prototype]] of an object will cause your code to run very slowly

Creator 2.x
#1

Simulator: 632:mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create

c++ 部分打印出来的日志，有什么办法知道是js的什么位置出错？

#2

看一下\CocosCreator\resources\cocos2d-x\simulator\win32\src\project.dev.js第632行

#3

function typedArraySupport () {
try {
var arr = new Uint8Array(1)
arr.proto = {proto: Uint8Array.prototype, foo: function () { return 42 }} ** // 此行引发**
return arr.foo() === 42 && // typed array instances can be augmented
typeof arr.subarray === ‘function’ && // chrome 9-10 lack subarray
arr.subarray(1, 1).byteLength === 0 // ie10 has broken subarray
} catch (e) {
return false
}
}

我看了下这部分是编译后才有的代码，请指教

#4

net.rar (9.4 KB)

请官方同学帮忙看下 怎么处理？

#5

Q: 真机或模拟器运行时报错：“Mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create”
A: 这是由于某些第三方库，或者项目中用到了 ES2015（ES6）的类继承语法，而 Babel 在转义这个语法时会调用到 SpiderMonkey 不太优化 API，所以 SpiderMonkey 给出了这个报错。