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From: "Richard M. Stallman" <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Potential GC-related problems in compose_chars_in_text
Date: Tue, 13 Sep 2005 11:54:52 -0400
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I think that the cleanest thing to do, in loops that don't need to be
as fast as possible, is avoid saving addresses of string data at all.

I suspect that compose_chars_in_text does not need to be as fast as
possible.  Handa, do you think it does?