2009-05-19 Maciej Stachowiak <mjs@apple.com>

2009-05-19  Maciej Stachowiak  <mjs@apple.com>

        Reviewed by Gavin Barraclough.

        - speed up string comparison, especially for short strings

        ~1% on SunSpider

        * JavaScriptCore.exp:
        * runtime/UString.cpp:
        * runtime/UString.h:
        (JSC::operator==): Inline UString's operator==, since it is called from
        hot places in the runtime. Also, specialize 2-char strings in a similar way to
        1-char, since we're taking the hit of a switch anyway.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@43856 268f45cc-cd09-0410-ab3c-d52691b4dbfc