Your bug report

#20352: Factor 2 slow down of font-locking in c-mode

which was filed against the emacs,cc-mode package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 20352@debbugs.gnu.org.

-- 
20352: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20352
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems