Javascript性能考虑。点运算符比下标表示法更快吗？ [英] Javascript performance consideration. Is dot operator faster than subscript notation?

问题描述

点运算符是否比下标表示法快？

Is dot operator faster than subscript notation?

var obj = {x: '5'};
obj.x = 'some value';
obj['x'] = 'some value';

推荐答案

没有什么令人难以置信的担忧。按窗口或 eval 访问变量的速度要慢得多。

Not anything incredibly worrying. Acessing variables by window or eval are significantly slower though.

http://jsperf.com/dot-vs-square-bracket/5

这篇关于Javascript性能考虑。点运算符比下标表示法更快吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！