Boost logo

Boost :

Subject: Re: [boost] [uuids] On boost::uuids::uuid operator == performance.
From: Peter Dimov (pdimov_at_[hidden])
Date: 2012-04-16 13:16:01

Michael Kochetkov wrote:
> > I'm using VC++2005 though.

> I do remember that at least memcpy intrinsic worked pretty smart in that
> compiler.

It does.

I think I see what's going on. memcmp has to return -1, 0 or 1. This is why
it does an initial DWORD loop to find the first mismatch, then does a byte
compare to determine the return value.

Boost list run by bdawes at, gregod at, cpdaniel at, john at