>>>>> Paul Eggert <eggert@cs.u...> writes:

>> I then change my font to:
>>
>> "-*-Courier-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1"

> How did you change your font?  Giving details here will make it easier for
> others to reproduce the problem.

Sorry for being imprecise on that one.  I have this in my init.el:

(custom-set-variables
'(default-frame-alist (quote ((font . "-apple-Courier-medium-normal-normal-*-15-*-*-*-m-0-iso10646-1") (cursor-color . "#b247ee")))))

> I notice that you're enabling multiple debugging options; this might cause
> Emacs to be slow for you even if it works fine for others.

It happens to me with -O3 and no debug options too.

John