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Re: Low redisplay performance (23 regression)

From: Dan Nicolaescu
Subject: Re: Low redisplay performance (23 regression)
Date: Wed, 29 Apr 2009 11:38:42 -0700 (PDT)

David Reitter <address@hidden> writes:

  > I've been noticing a substantial slowdown in redisplay performance.
  > Scrolling down emacs.c in fundamental-mode takes about 2 seconds in
  > Emacs 22 (Carbon port), and 3 seconds in Emacs 23 (NS port).
  > With font-lock-mode (in c-mode) enabled, the difference is even larger:
  > About 2.5 seconds in Emacs 22, and more than 7 seconds in 23/NS.
  > The effect interacts with the display of overlays etc. in the header
  > line.  When turning that off, I get about 2.5 seconds in Emacs 22, and
  > still more than 4 seconds in 23/NS.  (All values estimated manually
  > from several tries.)
  > I'm wondering if others get the same on other platforms comparing 22
  > and 23, or if this is a problem specifically in the NS port (for
  > example, with setting drawing color or the like).

I have not measured anything, but I do not see any visible difference on

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