自己用浏览器跑循环测试和用jsperf跑 在opera的时候结果相反 是什么原因？哪个才是对的 jsperf测试 http://jsperf.com/md5-bechmark 浏览器测试 console.time('js_md5'); for(var i = 0;i < 10000;++i) js_md5('The quick brown fox jumps over the lazy dog'); console.timeEnd('js_md5'); console.time('jkmyers_md5'); for(var i = 0;i < 10000;++i) jkmyers_md5('The quick brown fox jumps over the lazy dog'); console.timeEnd('jkmyers_md5');