Strings and iostreams: STL implementations comparison

Http://complement.sourceforge.net/compare.pdf
 
This article present comparison of strings (and some iostreams features) Implementation in stlport (v. 5.0.1) and libstd ++. this tests also can help to answer on questions: Is it strings copy algorithm with constant complexity better than algorithm with linear complexity? What allocator is better? This comparison is done on the base of stlport strings, ropes and libstd ++ strings. I expect CT that this results will help to make demo-between STL implementations as well proper choice of strweings implementation.