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Re: on the speed of std::string::find


Paolo Carlini wrote:

Dennis Lubert wrote:

Hello,

I recently did some profiling of my application (compiled with gcc 4.1)
using callgrind (part of valgrind). I found out that the good old
std::strstr is between 4 and 20 times faster than std::string::find.

First, which version of gcc are you using? Recent versions simply delegate to the std::search in <algorithm>, which was benchmarked to be much faster than an algorithm based on char_traits::find, thus memchr, basically.

Actually, the old algorithm was based on char_traits::compare, thus memcmp. Anyway...


Paolo.


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