sand@blarg.net ha scritto:
> 
> Anything that can generate 6kB lines in your complation buffer should
> do.  Try calling a shell script that writes the long line.  For me, it
> was a long compilation line from "make".

Indeed! The attached script 'prints' 6x1024 'x' characters, and on
GNU/LINUX KUBUNTU 8.04.02 it takes:

4 seconds with Emacs CVS LESS THAN OR EQUAL TO (<=) 20090129 15:30

2:15 minutes, i.e. 60x2+15=135 seconds with Emacs GREATER THAN OR EQUAL
TO (>=) 20090129 15:40!

To reproduce:

$ emacs -Q &

M-x compile
C-a C-k
./test_script-6KB.sh

> 
> I was also able to narrow it down to around that date.
> 
>   cvs up -D 2009-01-29
> 
> works fine with my test case,
> 
>   cvs up -D 2009-01-30

see above...

Cheers,
    Angelo.

---
References:

http://lists.gnu.org/archive/html/emacs-devel/2009-02/msg00162.html