用大多数现代浏览器执行此测试后......

After performing this test with most modern browsers...

http://jsben.ch/y3SpC

目前 ，最快的循环形式（在我看来，语法最明显）。

Currently, the fastest form of loop (and in my opinion the most syntactically obvious).

标准具有长度缓存的循环

a standard for loop with length caching

for (var i = 0, len = myArray.length; i < len; i++) {

}

我想这肯定是我鼓掌JavaScript引擎的情况开发人员。运行时间应针对清晰度进行优化，不要聪明。

I would say this is definitely a case where I applaud JavaScript engine developers. A run time should be optimized for clarity, not cleverness.