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Re: Display performance degradation
From: |
Kenichi Handa |
Subject: |
Re: Display performance degradation |
Date: |
Fri, 18 Dec 2009 14:46:14 +0900 |
In article <address@hidden>, Jan Djärv <address@hidden> writes:
> How much is extremely, do you have figures? I haven't noticed any change,
> maybe it only manifests itself for certain locales.
Actually, "extremely" was a too strong word. The following test:
(save-window-excursion
(delete-other-windows)
(switch-to-buffer "TUTORIAL.ja")
(goto-char (point-min))
(benchmark-run 1
(sit-for 0)
(while (condition-case nil
(progn (scroll-up) (sit-for 0))
(error nil)))))
shows that the latest Emacs is about 1.45 times slower (I
turned off all of tool-bar-mode, menu-bar-mode,
scrool-bar-mode, line-number-mode).
But, the perceived difference is much more.
With the previous code, when I type C-v in TUTORIAL.ja
buffer, the upper and middle part of the window (40 lines)
is updated almost instantly, and I notice the redrawing
process only at the bottom few lines. So, I feel no
frustration. But, with the current code, with C-v, I see
that the middle part is still under construction. It's a
big difference in human's perception.
---
Kenichi Handa
address@hidden
- Display performance degradation, YAMAMOTO Mitsuharu, 2009/12/16
- Re: Display performance degradation, Kenichi Handa, 2009/12/17
- Re: Display performance degradation, Chong Yidong, 2009/12/17
- Re: Display performance degradation, Jan Djärv, 2009/12/17
- Re: Display performance degradation, Kenichi Handa, 2009/12/20
- Re: Display performance degradation, Miles Bader, 2009/12/20
- Re: Display performance degradation, Lennart Borgman, 2009/12/20
- Re: Display performance degradation, Miles Bader, 2009/12/20
- Re: Display performance degradation, Lennart Borgman, 2009/12/20
- Re: Display performance degradation, Miles Bader, 2009/12/20
- Re: Display performance degradation, Lennart Borgman, 2009/12/20