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Re: ediff-next-difference very slow

From: Ralf Fassel
Subject: Re: ediff-next-difference very slow
Date: 22 Apr 2002 10:46:13 +0200
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

* address@hidden (Michael Kifer)
(I am not the original author, but have similar problems with ediff.)

| Do you do something unusual, such as running long ediff (not emacs)
| sessions that last several days?

No.  usually running time is 1/2 hour per file, one ediff session
rarely lasts longer than 1/2 day.  The slow down is max when text
regions of more than say 40 lines with lots of white space differences
and a few changed words in few lines are shown.  It does not matter
whether there are 5 or 50 difference regions per file.

| Do you see the slowdown regardless of whether you used ediff in the
| prior days or it depends on how many times you used ediff within the
| same emacs session?

No.  I log out every day, so max emacs/ediff uptime is 12-14hours.

| Finally, did you notice a similar slowdown with other emacs applications?

Yes.  Tar-mode and the other archive modes (arc, zip) are also slow
when extracting archive members for display, compared to 19.34.


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