Re: [boost] [uuids] On boost::uuids::uuid operator == performance.

Subject: Re: [boost] [uuids] On boost::uuids::uuid operator == performance.
From: Peter Dimov (pdimov_at_[hidden])
Date: 2012-04-16 07:58:50

Mathias Gaunard wrote:
> On 16/04/12 01:10, Michael Kochetkov wrote:
>
> > boost uses the following comparison operator:
> > inline bool operator==(uuid const&  lhs, uuid const&  rhs) /* throw() */
> > {
> >      return std::equal(lhs.begin(), lhs.end(), rhs.begin());
> > }
> >
> > which end up with the following code:
> > lea edx, DWORD PTR _id2$[esp+92]
> > lea ecx, DWORD PTR _id1$[esp+108]
> > lea eax, DWORD PTR _id1$[esp+92]
> > call ?_Equal_at_std@@YA_NPBE00_at_Z ; std::_Equal
>
>
> A good implementation of std::equal would call memcmp here, ...

It does.