review for 7103784: enable some flags by default

Tom Rodriguez tom.rodriguez at
Fri Oct 21 18:10:46 PDT 2011
3 lines changed: 0 ins; 0 del; 3 mod; 4396 unchg

7103784: enable some flags by default

Enable UseCodeCacheFlushing, UseRDPCForConstantTableBase and
OptimizeStringConcat by default.  UseCodeCacheFlushing and
OptimizeStringConcat are tested by various settings in our nightlies
so there should only be minor issues.  UseRDPCForConstantTableBase has
been tested and was only off because the performance was unclear but
we believe it performs well on newer hardware.

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