[issue1302] Fixes for profile/cprofile

[Christian Heimes]

Christian Heimes added the comment:

Alexandre Vassalotti wrote:
> I don't think it's possible to add shortcuts in PyUnicode_Decode for
> UTF-16 and UTF-32 because the byte-order can be different depending of
> the platform. So, these two need to pass through the codecs module.

utf-16 and utf-32 are the the names for the native codecs. The explicit
names are e.g. utf-16-be or utf-32-le. The last argument 0 also means
"native byte order".

I used a shorter algorithm to optimize the normalization for the special
cases of the strcmp() shortcuts. Your version is fine but takes several
CPU cycles longer. I don't think it has a large performance impact. ;)

Christian

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