Performance of pIter != cont.end() in for loop

Question

I was getting through \"Exceptional C++\" by Herb Sutter lately, and I have serious doubts about a particular recommendation he gives in Item 6 - Temporary Objects.

Answer 1

Containers like vector returns variable, which stores pointer to the end, on end() call, that optimized. If you've written container which does some lookups, etc on end() call consider writing

for (list::const_iterator i = emps.begin(), end = emps.end(); i != end; ++i)
{
...
}

for speed