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From: Richard Stallman <rms@gnu.org>
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Subject: Stealth fontification GCs a lot
Date: Sun, 10 Apr 2005 21:57:00 -0400
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I have been trying Font Lock mode, which I never used to use before.
I notice that when stealth fontification is occurring, Emacs spends
about 1/3 of its time GCing.  The frequent GCs make for annoying
latency when I type another command.

Could someone investigate why so much consing goes on during
fontification, and try to make it more efficient?