[userbinator]

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]

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]

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...