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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Extended menu items, when are :enable and :filter computed?
Date: Tue, 28 Feb 2006 01:19:54 -0500
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Xref: news.gmane.org gmane.emacs.devel:51053
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    I've always viewed such a change as a performance improvement for those
    cases where we use large dynamically-generated menus or menus with lots of
    shortcuts to compute (X-Symbol comes to mind).

Is this optimization really worth while on modern computers?