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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Accelerating Emacs?
Date: Fri, 28 Oct 2005 10:25:47 +0200
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> From: "Herbert Euler" <herberteuler@hotmail.com>
> Date: Fri, 28 Oct 2005 10:25:41 +0800
> 
> Emacs is undoubtly the most powerful editor because of
> its architecture, Elisp causes lots of problems solvable within
> Emacs. But Emacs seems to be a bit slower for the same
> reason.

Primitive operations that are used a lot and need to be fast are
written in C, not in Lisp.

FWIW, on a reasonably fast machine, I find Emacs reasonably fast for
day-to-day operation.