Profiling shows that operationGetById is the hottest function when running V8 regexp
Created attachment 226999 [details]
When V8 regexp is run from the command line, this patch nets a 2% performance improvement.
Using the JS performance test script, this patch didn't noticeably improve performance. This is likely due to longer running code being optimized by the DFG.
Committed r165797: <http://trac.webkit.org/changeset/165797>