Powershell 单引号与双引号 [英] Powershell single quote vs double quote

问题描述

我知道使用单引号而不是双引号的区别在于变量不会被扩展.

I know that difference between using single quote instead of double quote is that variables aren't expanded.

$a = "hello"
"$a world"    # hello world
'$a world'    # $a world

我习惯使用双引号，但我想单引号可能更有效.这总是真的吗?有关于这个主题的一些文档吗?我用谷歌搜索了一下，但结果被关于扩展变量的解释淹没了

I am accustomed to use double quote, but I guess that single quote could be more efficient. Is this always true? Is there some documentation about this topic? I googled a bit but results are overwhelmed by explanation about expanding variables

推荐答案

如果您没有嵌入变量或子表达式，效率很可能不是问题.

Efficiency is very probably a non-issue if you don't have embedded variables or subexpressions.

使用 Measure-Command 进行的快速测试显示没有任何区别.

A quick test with Measure-Command showed no difference at all.

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