Re: [PATCH] avoid exponential regex match for java and objc function names

Ah ok. Im not familiar with the finer points of the POSIX engine, but
PCRE and Perl's engine, and most similar engines are not true regular
expression engines and thus benefit *greatly* from atomic matching if
it is available.

Like the difference between heat-death performance (or stack
overflow), and running instantly.

You can almost always fix the regex to avoid this, by ensuring that 
whenever you have (...)+ (or *) a suffix of the subexpression cannot be 
a prefix of the subexpression too.  This is what my patch did -- 
changing a bad regex to a nicely behaving one.

Paolo