Re: [boost] [uuid] Interface

Subject: Re: [boost] [uuid] Interface
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-12-23 19:09:38

AMDG

Scott McMurray wrote:
>> As for efficiency I expect this variant to be at least as efficient (if not
>> better) because uuid::nil() is likely to have and to return the same
>> initialized-once instance
>>
>>     
>
> I'd be very suspicious of that claim.  The cache miss for going to get
> that instance could well be worse.
>   

msvc 9.0 compiles

    boost::array<char, 16> data;
    for(boost::array<char, 16>::iterator i = data.begin(), end = 
data.end(); i != data.end(); ++i) {
        *i = '\0';
    }

into

xor         eax,eax
mov         dword ptr [esp],eax
mov         dword ptr [esp+4],eax
mov         dword ptr [esp+8],eax
mov         dword ptr [esp+0Ch],eax

In Christ,
Steven Watanabe