[Mono-devel-list] Char.IsXXX() patch: from InternalCall to managed

[Atsushi Eno]

> I found that existing Char.IsWhitespace() and Char.IsSeparator() are
> slower than MS.NET. I found that they are InternalCall, so I tried to
> implement them in Char.cs natively and the got 2x speed. So I think
> it would be better if we move these (and the same kind of) methods
> into managed world.

Ok, it could be still more efficient. Now I added another IsDigit()
implementation (it is "optimized" specifically for digits).
It enhanced the speed nearly 2.5x to 3x and now faster than MS.NET,
especially the char is in ASCII range.

BTW, we have other IsXXX() methods:

	- IsControl()
	- IsLetter()
	- IsLower()
	- IsNumber()
	- IsPunctuation()
	- IsSurrogate()
	- IsSystem()
	- IsUpper()

It can be easily done (with an easy program like attached one).
Any volunteers on them?

Atsushi Eno

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