Re: Benchmarking STL - is my code optimal?

Somewhat inspired by the D programming language thread and famous "wc"
example

http://www.digitalmars.com/d/cppstrings.html

(where D soundly beats C++, but in fact just standard C++ library), I
have decided to compare the speed of my "reinvented wheel" (Ultimate++
platform uses own set of containers, own String, reimplements heap
allocator etc, etc...) to the solution based on standard C++ library.

The benchmark description and results can be found here:

http://www.ultimatepp.org/www$uppweb2$vsstd$en-us.html

Of course, numbers alone are interesting as well, e.g. I have not
expected so much performance delta between 32-bit and 64-bit mode
(20%!), I thought than Dinkumware provides better implementation than
GCC team (maybe it is just this particular case), surprising
performance drop for latest Visual C++ (I think it must be all these
Microsoft forced checks...) etc..

Anyway, I am not STL expert, so the real question is:

Have I missed some possible optimizations in the STL code?