有什么原因不使用UTF-8，16，等等一切吗？ [英] Is there any reason not to use UTF-8, 16, etc. for everything?

问题描述

我知道网络大多是标准化的UTF-8最近，我只是想知道是否有任何地方使用UTF-8将是一件坏事。我听说过UTF-8，16等可能会使用更多的空间，但是到底它是可以忽略的。

I know the web is mostly standardizing towards UTF-8 lately and I was just wondering if there was any place where using UTF-8 would be a bad thing. I've heard the argument that UTF-8, 16, etc may use more space but in the end it has been negligible.

此外，在Windows程序，

Also, what about in Windows programs, Linux shell and things of that nature -- can you safely use UTF-8 there?

推荐答案

如果UTF-32可用，优先于其他版本进行处理。

If UTF-32 is available, prefer that over the other versions for processing.

如果您的平台支持UTF-32 / UCS-4 Unicode，那么压缩版本UTF-8和UTF-16可能会更慢，每个字符（字符序列）的字节数，这使得不可能通过索引在字符串中进行直接查找，而UTF-32对每个字符使用32位flat，从而加快了一些字符串操作。

If your platform supports UTF-32/UCS-4 Unicode natively - then the "compressed" versions UTF-8 and UTF-16 may be slower, because they use varying numbers of bytes for each character (character sequences), which makes impossible to do a direct lookup in a string by index, while UTF-32 uses 32 bit "flat" for each character, speeding up some string operations a lot.

当然，如果你在一个非常受限制的环境中编程，比如嵌入式系统，可以肯定只有ASCII或ISO 8859-x字符， ，那么您可以选择这些字符集的效率和速度。但一般来说，请使用 Unicode转换格式。

Of course, if you are programming in a very restricted environment like, say, embedded systems and can be certain there will be only ASCII or ISO 8859-x characters around, ever, then you can chose those charsets for efficiency and speed. But in general, stick with the Unicode Transformation Formats.

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