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bug#10652: 24.0.93; font-lock very slow for C++
From: |
Alan Mackenzie |
Subject: |
bug#10652: 24.0.93; font-lock very slow for C++ |
Date: |
Fri, 2 Mar 2012 22:27:47 +0000 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hello Yidong, hello Helmut.
On Sun, Feb 26, 2012 at 05:47:25PM +0800, Chong Yidong wrote:
> Helmut Eller <eller.helmut@gmail.com> writes:
> > Font lock is extremely slow in this file:
> > http://hg.openjdk.java.net/jdk7/jdk7/hotspot/raw-file/b92c45f2bc75/src/share/vm/runtime/globals.hpp
> > Download the file and open it with emacs -Q globals.hpp. Then
> > scroll around in the file to see how slow it is.
> I got Emacs into an uninterruptible loop while scrolling through the
> buffer :-(
> Looks like a regression against Emacs 23's CC mode, which handles the
> file just fine. Alan, could you investigate? Thanks.
I've just committed a collection of optimisations as revision #107485. I
can now scroll through the huge macro in that file quite quickly.
However, typing in the buffer is still suboptimal. I don't know how much
I'll be able to do to sort this out.
--
Alan Mackenzie (Nuremberg, Germany).