字符串插值VS的String.Format [英] String Interpolation vs String.Format

问题描述

有没有使用字符串插值之间的noticable性能差异：

Is there a noticable performance difference between using string interpolation:

myString += $"{x:x2}";

VS的String.Format（）？

vs String.Format()?

myString += String.Format("{0:x2}", x);

我只问，因为ReSharper的是促使修复和我之前已经忽悠了。

I am only asking because Resharper is prompting the fix, and I have been fooled before.

推荐答案

Noticable是相对的。但是：串插在编译时变成的String.format（）所以他们应该具有相同的结果结束了

Noticable is relative. However: string interpolation is turned into string.Format() at compile-time so they should end up with the same result.

有细微的差别，但：正如我们从的这个问题，在额外的 string.Concat（）调用格式说明结果字符串连接。

There are subtle differences though: as we can tell from this question, string concatenation in the format specifier results in an additional string.Concat() call.

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