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Re: M-x grep is too slow


From: Richard Stallman
Subject: Re: M-x grep is too slow
Date: Sat, 17 Jul 2004 07:54:13 -0400

    Looking with a debugger, a lot of time is spent in
    previous-single-property-change.

    Maybe caching the last position of `directory' and `message' properties
    would make a difference ?

Do you mean caching at the Lisp level inside Font-Lock mode?
That might be easy to do.

Where is previous-single-property-change being called from?
Maybe a change there is what we need.


Aside from that, I have a feeling it is wrong for Compilation
mode to turn on Font-Lock mode by default.  This nonuniformity
in the control of Font-Lock mode seems wrong.
 




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