[Mono-devel-list] [Patch] Manged code is fast!

[Ben Maurer]

> private unsafe static void CharCopy (char* source, char* destination, int count)

What is the perf here if things are not dword aligned?


> +			while (count >= 16) {
> +				*((int*) destination) = *((int*) source);
> +				destination += 2;
> +				source += 2;
> +				*((int*) destination) = *((int*) source);
> +				destination += 2;
> +				source += 2;

It is probably better to do something like:

*((int*) dest + x) = ...

To figure out why, take a look at what kind of assembly is generated.
Probably, it is using a memindex type instruction. So the extra addition
has no overhead, but it saves you the two add instructions.

Also, I have a patch that I am working on which does an assembly impl of
String.Equals. I got great perf on it, so maybe we can get something
similar. 

-- Ben