A simple benchmark

[Paolo Carlini]

Hi,

the impact on append/assign/insert/replace members having the source 
data specified in terms of iterators of the replace specializations 
should be quite obvious at this point, but, nevertheless, this is what 
is obtained on my PII-400 (-O2) for a simple append test:

#include <string>

int main()
{
  std::string dest;
  std::string source = "data";

  for (int i = 0; i < 10000000; ++i)
    dest.append(source.begin(), source.end());
}


Current mainline:
-----------------
9.240u 0.520s 0:10.07 96.9%     0+0k 0+0io 219pf+0w

Current mainline + specializations patch
----------------------------------------
4.380u 0.550s 0:05.09 96.8%     0+0k 0+0io 218pf+0w

Ciao,
Paolo.