单引号比双引号更快？
[英]Single quotes faster than double quotes?
问题描述
I was wondering which quotes I should use for strings in JavaScript. 
我想知道应该在JavaScript中对字符串使用哪些引号。 I tend to use single quotes, but use double quotes depending on the scenario ("I'm pregnant!"). 我倾向于使用单引号，但根据情况使用双引号（“我怀孕了！”）。 I ran a JavaScript performance test, and it appears single quotes are faster? 我进行了JavaScript性能测试，看来单引号更快了吗？
Does anyone know why single quotes would be faster??? 有谁知道为什么单引号会更快？？？
1 个解决方案
解决方案1
10 已采纳
Let's take the numbers in your screenshot as an example. 让我们以屏幕快照中的数字为例。
- single quotes: 711,222,327 ops/sec, ±0.27%. 单引号：711,222,327个操作/秒，±0.27％。
- double quotes: 708,941,116 ops/sec, ±0.31%. 双引号：708,941,116个操作/秒，±0.31％。
They differ from their average by 0.1%, which is less than they vary between runs . 它们与平均值之间的差异为0.1％， 小于两次运行之间的差异 。 The results placing one over another aren't meaningful. 一个接一个的结果没有意义。 As to why they vary between runs: empty loops are fast and can be influenced a lot by your CPU changing clock speeds to adjust to temperature, or background processes, or butterflies from the other side of the world. 至于为什么它们在运行之间会有所不同：空循环速度很快，并且CPU更改时钟速度以适应温度，后台进程或来自世界另一端的蝶形，这可能会大大影响空循环。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.