From Markus:   Do not use TString helper for streaming of std::string.   Native implementation is 60 % faster for small strings.
From Markus:
  Do not use TString helper for streaming of std::string.
  Native implementation is 60 % faster for small strings.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@11935 27541ba8-7e3a-0410-8455-c3a389f83636

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