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Re: [h-e-w] ediff speed, 21.1 vs 20
From: |
Jeff Rancier |
Subject: |
Re: [h-e-w] ediff speed, 21.1 vs 20 |
Date: |
Thu, 8 Aug 2002 15:06:54 -0400 |
I find loading anything now is extremely slow. That is the first time.
Once ediff is loaded, it seems to work fine.
Jeff
----- Original Message -----
From: "Bill Pringlemeir" <address@hidden>
To: "Stephen Leake" <address@hidden>
Cc: <address@hidden>
Sent: Thursday, August 08, 2002 2:55 PM
Subject: Re: [h-e-w] ediff speed, 21.1 vs 20
|
| Stephen> I've been usingn Gnu Emacs 21.1 for a few months now, and I
| Stephen> like it. However, it has one drawback compared to Emacs 20;
| Stephen> ediff has slowed down tremendously, for diff sections that
| Stephen> are multiple lines.
|
| I have experienced the same thing.
|
| "GNU Emacs 21.2.1 (i386-msvc-nt4.0.1381) of 2002-03-19 on BILL"
|
| It seems to be related to large difference regions [at least refined
| regions]. It also finds ediff-directories finds between files with
| different line endings (Unix/DOS), but when ediff runs on the files,
| there is no difference.
|
| Stephen> Does anyone have a clue why it slowed down so much, or how
| Stephen> to speed it back up?
|
| I don't think that this line ending stuff happened before. A vague
| clue?
|
| Size Last modified Name
| ----------------------------------------------
|
| Session 1:
| 46283 Nov 30 2000 14:44:47 e:/emacs-20.7/lisp/ediff-diff.el
| 47302 Jul 21 2001 02:28:24
e:/src/emacs-21.2/lisp/ediff-diff.el
| Session 2:
| 13584 May 4 1998 19:33:16 e:/emacs-20.7/lisp/ediff-help.el
| 13540 Jul 16 2001 04:46:48
e:/src/emacs-21.2/lisp/ediff-help.el
| Session 3:
| 13691 May 4 1998 19:33:18 e:/emacs-20.7/lisp/ediff-hook.el
| 13828 Jul 16 2001 04:46:48
e:/src/emacs-21.2/lisp/ediff-hook.el
| Session 4:
| 68043 Nov 11 1998 20:54:52 e:/emacs-20.7/lisp/ediff-init.el
| 69645 Sep 9 2001 19:33:38
e:/src/emacs-21.2/lisp/ediff-init.el
| Session 5:
| 11795 May 4 1998 19:33:20 e:/emacs-20.7/lisp/ediff-merg.el
| 14487 Jul 16 2001 04:46:48
e:/src/emacs-21.2/lisp/ediff-merg.el
| Session 6:
| 79338 May 30 1998 11:32:04 e:/emacs-20.7/lisp/ediff-mult.el
| 80375 Sep 28 2001 00:06:09
e:/src/emacs-21.2/lisp/ediff-mult.el
| Session 7:
| 26433 Nov 30 2000 16:10:48 e:/emacs-20.7/lisp/ediff-ptch.el
| 27375 Jul 21 2001 02:28:24
e:/src/emacs-21.2/lisp/ediff-ptch.el
| Session 8:
| 139349 May 2 2000 09:47:00 e:/emacs-20.7/lisp/ediff-util.el
| 142708 Jul 21 2001 02:28:24
e:/src/emacs-21.2/lisp/ediff-util.el
| Session 9:
| 13492 May 4 1998 19:33:28 e:/emacs-20.7/lisp/ediff-vers.el
| 10174 Jul 16 2001 04:46:48
e:/src/emacs-21.2/lisp/ediff-vers.el
| Session 10:
| 47005 May 4 1998 19:33:32 e:/emacs-20.7/lisp/ediff-wind.el
| 46488 Jul 16 2001 04:46:48
e:/src/emacs-21.2/lisp/ediff-wind.el
|
| After looking at all the differences, the thing that comes to mind is
| the overlays. I think that the display updating has changed
| considerably. Perhaps overlays and font-lock stuff were calculated
| before displaying the buffer previously. When you whip through the
| diffs, hitting `n' for next, there are times when it pauses for a long
| time. This was not the previous behviour... and this is the thing I
| notice. For instance, when diffing "ediff-ptch.el", there are 32
| diffs. When highlighting the 13th, 14th regions, I note a long pause
| (longer relative to the lavish spriteness Emacs 20.xx afforded me).
| This causes the font-lock to change the highlighting. I think that
| this stuff is precomputed as the areas are highlighted prior to this.
| However, the area is a single color. I don't know when the refinement
| is done, but when that region is active, there are now multiple
| colours. Note too much help...
|
| fwiw,
| Bill Pringlemeir.
|