Comment 7 for bug 908508

I probably should try to fix bustage from bug 673188 at the same time. The options are temporarily commit a change to js/src/Makefile.in to allow builds to continue using the slower YARR interpreter, in the hopes that lazy regexps will mitigate the hit going from PCRE. The other option is to try to deal with both at the same time. The final option is to do both: commit the bandaid, then try to commit a better fix. Which would be okay with you, Chris/David?