*Instead of memset() you've got ZeroMemory(), instead of memcpy() you've got Cop... | Hacker News

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		userbinator 9 months ago \| parent \| context \| favorite \| on: I built a native Windows Todo app in pure C (278 K... Instead of memset() you've got ZeroMemory(), instead of memcpy() you've got CopyMemory(). I believe MSVC intrinsics will use the rep stos/movs instructions, which are even smaller than calling functions (which includes the size of their import table entries too.)

kevin_thibedeau 9 months ago [–]

The standard allows memset/memcpy to be replaced by inline code. There is no need to use non-standard extensions to get a performance boost.

userbinator 9 months ago | [–]

That's how the MSVC intrinsics work. Turn on the option and memset/memcpy, among others, gets replaced automatically:

https://learn.microsoft.com/en-us/cpp/preprocessor/intrinsic...

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