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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: cl-dolist, dolist, cl-return,
Date: Fri, 10 Jul 2015 12:57:27 -0400	[thread overview]
Message-ID: <jwvio9sq7g9.fsf-monnier+gmane.emacs.help@gnu.org> (raw)
In-Reply-To: 87oajmi6eh.fsf@nl106-137-147.student.uu.se

> But I'm not using nth - probably you misread "neq".

No, I'm talking about the code used internally by dolist.  If the list
over which we iterate were re-computed each time, then to find the "next"
element, we'd need to use nth at each iteration.

IOW it's a different problem from the re-computation of array bounds at
each iteration (which would be inefficient in itself but wouldn't impose
additional inefficiencies on the rest of the loop).


        Stefan




  parent reply	other threads:[~2015-07-10 16:57 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-08  0:14 cl-dolist, dolist, cl-return, Emanuel Berg
2015-07-08  0:31 ` John Mastro
2015-07-08  3:09   ` Stefan Monnier
2015-07-08 10:25     ` Emanuel Berg
2015-07-08 14:44       ` Stefan Monnier
2015-07-08 23:19         ` Emanuel Berg
2015-07-09  1:49           ` John Mastro
2015-07-09 22:00             ` Emanuel Berg
     [not found]             ` <mailman.6636.1436479362.904.help-gnu-emacs@gnu.org>
2015-07-10 18:44               ` Barry Margolin
2015-07-11 18:52                 ` Emanuel Berg
2015-07-10 16:57           ` Stefan Monnier [this message]
2015-07-08 10:23   ` Emanuel Berg
     [not found] <mailman.6511.1436314595.904.help-gnu-emacs@gnu.org>
2015-07-08  3:25 ` Pascal J. Bourguignon
2015-07-08 10:17   ` Emanuel Berg
2015-07-08 14:02     ` Drew Adams
2015-07-08 23:10       ` Emanuel Berg
     [not found]       ` <mailman.6588.1436397019.904.help-gnu-emacs@gnu.org>
2015-07-08 23:56         ` Pascal J. Bourguignon

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