bug#20134: Acknowledgement (24.4.90; Emacs slowdown to eventual hang)

[Eli Zaretskii]

> From: phillip.lord@newcastle.ac.uk (Phillip Lord)
> Cc: <20134@debbugs.gnu.org>
> Date: Tue, 07 Apr 2015 17:51:11 +0100
> 
> Okay, I think this is likely to be correct, and also why the backtraces
> are so useless. Emacs is making extensive use of CPU (running at 100%)
> but only when I am typing. When I stop (which I obviously have to do to
> check gdb, then the CPU drops again.
> 
> I've tried removing all post/pre command hooks with no success so far.

Maybe there are other customizations with the same effect.  Perhaps
look for other kinds of hooks (the full list is in the ELisp manual).