emacs22 takes almost 4 minutes to load large C file

[Brad Lucier]

Binary package hint: emacs22-common

To reproduce: Download and gunzip the file

http://www.math.purdue.edu/~lucier/launchpad/1/_num.c.gz

Loading into emacs22 with

emacs _num.c

takes about 4 minutes of CPU time on a 2.33GHz Core 2 Duo until the text appears. I have not .emacs file.

Ubuntu 9.04

The package is emacs22-common 22.20ubuntu2.

Uninstalling emacs22 and installing

emacs21 21.4a+1-5.6

fixes the problem (the file loads instantly).

[era (era)]

Confirmed with emacs -Q, emacs22-gtk 22.2-0ubuntu2 on Jaunty (stopped counting after 5 minutes; it did finish loading eventually, and load decreased significantly at that point).

I have a vague recollection that I saw an upstream bug which looked a lot like this one, but wasn't able to find it in the Emacs bug tracker in spite of spending an hour browsing around. http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3032 is not the one I was looking for, but might actually be the correct upstream bug for this particular case.