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emacs24 slower than emacs23

From: Ryo Furue
Subject: emacs24 slower than emacs23
Date: Fri, 7 Feb 2014 13:41:27 -0800 (PST)
User-agent: G2/1.0


I've recently switched from emacs23 to emacs24 on Debian testing.  (The new one 
is called "Version: 24.3+1-2+b1".)  I haven't made any changes to my ~/.emacs 
and everything works, except that emacs24 is noticeably slower than emacs23, 
sometimes painfully so.

Most of the slowness is tolerable, but one issue is painful.  When I'm using 
emacs24 on "X over SSH" and start to select portion of text (region) by 
pressing Ctrl-Space, the cursor movement becomes extremely slow, that is, it 
takes a lot of time to select a region.

Are there some settings to adjust to fix this problem?  I run emacs on an 
Debian server and my local machine is a Mac OS X machine running Xquartz.

In passing, I notice most new Linux applications aren't usable on X over SSH 
because they tend to use GUI decorations too much.  Traditional ones like 
emacs, xdvi, xpdf, xterm, etc., happily run on X over SSH, but they are 
minority.  If emacs becomes unusable, I'll probably have to stop X over SSH and 
perhaps rely on a cloud-shared directory (like Dropbox) or use tramp on local 



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