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From: Ian Collins <ian-news@hotmail.com>
Newsgroups: comp.lang.c++
Subject: Re: What practice can get speed improvement in C++?
Date: Thu, 06 Aug 2015 17:42:18 +1200
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Xref: csiph.com comp.lang.c++:37357

woodbrian77@gmail.com wrote:
>
> How about comparing these two programs:
>
> #include <string.h>
>
> int main ()
> {
>    for (int i = 0; i < 4000000; ++i){
>      char s[200];
>      ::strncpy(s, "We few; we happy few; we band of brothers.", sizeof(s));
>    }
> }
>
> and
>
> #include <string>
>
> int main ()
> {
>    for (int i = 0; i < 4000000; ++i){
>      ::std::string s = "We few; we happy few; we band of brothers.";
>    }
> }

A fairer comparison would be

int main ()
{
   std::string s;
   for (int i = 0; i < 4000000; ++i){
     s = "We few; we happy few; we band of brothers.";
   }
}

-- 
Ian Collins