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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: [RFC] Some new vector procedures (vector-{memq, apply, to-string, 
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Date: Sat, 20 Apr 2019 10:04:15 +0300
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To: Alex Gramiak <agrambot@gmail.com>
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In-reply-to: <8736md90v0.fsf@gmail.com> (message from Alex Gramiak on Fri, 19
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> From: Alex Gramiak <agrambot@gmail.com>
> Date: Fri, 19 Apr 2019 14:49:39 -0600
> 
> Here are a few procedures that should make using vectors in Elisp a bit
> nicer. They are in C since all the Elisp versions I've tried were too
> slow for such simple procedures.

Doesn't seq.el already provide this functionality?

As for speed, did you have any application where the speed of the Lisp
implementation was inadequate?

Thanks.