Re: ediff-next-difference very slow

[Eli Zaretskii]

> From: Roland Winkler <roland.winkler@physik.uni-erlangen.de>
> Date: Wed, 17 Apr 2002 15:21:37 +0200
> 
> According to my-ediff-next, ediff-next-difference requires 1 or 2
> seconds in a fresh emacs session on my old pentium processor. But an
> emacs session that has been running for many days requires 6 or
> 7 seconds for each of the two differences between the files foo
> and bar.
> 
> What's going on here? Is this a known problem? How can I try to
> further pin down why ediff becomes so slow?

It seems that having many overlays in a buffer slows down Emacs quite
a bit.  Perhaps this problem is another manifestation of that?

> PS: node `Compilation Tips' in the elisp manual says
> 
>    * Profile your program with the `profile' library or the `elp'
>      library.  See the files `profile.el' and `elp.el' for instructions.
> 
> However, in profile.el it says that profile.el has become obsolete.

Thanks, I fixed this for the next release.