From: Emanuel Berg <moasen@zoho.com>
To: help-gnu-emacs@gnu.org
Subject: Re: killing the result of isearch
Date: Mon, 20 Nov 2017 04:24:05 +0100 [thread overview]
Message-ID: <867eulzl7u.fsf@zoho.com> (raw)
In-Reply-To: 87o9o5x4ir.fsf@fliptop
Tomas Nordin wrote:
> But there will be only one level of recursion
> that I am aware of. Is a recursive function
> call slower than a regular function call?
> I am aware there is a maximum
> recursion depth.
Here is what it says in the manual [1]
Use iteration rather than recursion
whenever possible. Function calls are slow
in Emacs Lisp even when a compiled function
is calling another compiled function.
Which is what I said, right? But it also says
Using the primitive list-searching
functions ‘memq’, ‘member’, ‘assq’, or
‘assoc’ is even faster than explicit
iteration. It can be worth rearranging
a data structure so that one of these
primitive search functions can be used.
"Explicit iteration" = e.g., a `while' loop
with a condition and the increment of
a variable. This is everyday loop usage in
languages such as C, C++ ...
"Primitive" = "A 'primitive function' is
a function callable from Lisp but written in
the C programming language." [2]
[1] (info "(elisp) Compilation Tips"
[2] (info "(elisp) Primitive Function Type")
--
underground experts united
http://user.it.uu.se/~embe8573
next prev parent reply other threads:[~2017-11-20 3:24 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 2:41 killing the result of isearch Jean-Christophe Helary
2017-11-07 5:34 ` Drew Adams
2017-11-07 6:01 ` Jean-Christophe Helary
2017-11-07 6:25 ` Søren Pilgård
[not found] ` <mailman.3103.1510035932.27995.help-gnu-emacs@gnu.org>
2017-11-07 7:07 ` Loris Bennett
2017-11-07 7:49 ` Jean-Christophe Helary
2017-11-07 8:43 ` Jean-Christophe Helary
[not found] ` <mailman.3106.1510044223.27995.help-gnu-emacs@gnu.org>
2017-11-07 10:49 ` Loris Bennett
2017-11-07 12:45 ` Jean-Christophe Helary
2017-11-07 15:26 ` Drew Adams
2017-11-07 15:51 ` Jean-Christophe Helary
2017-11-07 16:46 ` Drew Adams
2017-11-07 22:38 ` Jean-Christophe Helary
2017-11-07 16:53 ` Eric Abrahamsen
2017-11-07 17:24 ` Drew Adams
2017-11-07 17:45 ` Eric Abrahamsen
2017-11-08 8:21 ` Thien-Thi Nguyen
2017-11-08 13:47 ` Emanuel Berg
2017-11-11 15:36 ` Charles A. Roelli
[not found] ` <mailman.3114.1510058721.27995.help-gnu-emacs@gnu.org>
2017-11-07 15:08 ` Loris Bennett
2017-11-07 15:28 ` Jean-Christophe Helary
2017-11-07 16:24 ` Drew Adams
2017-11-07 22:34 ` Jean-Christophe Helary
2017-11-07 22:54 ` Drew Adams
2017-11-08 22:24 ` Tomas Nordin
2017-11-08 22:44 ` Jean-Christophe Helary
2017-11-08 23:07 ` Emanuel Berg
2017-11-09 21:38 ` Tomas Nordin
2017-11-10 13:11 ` Jean-Christophe Helary
2017-11-10 16:54 ` Drew Adams
2017-11-07 8:31 ` Marcin Borkowski
2017-11-07 15:26 ` Drew Adams
2017-11-07 20:59 ` Bob Proulx
2017-11-07 22:10 ` Drew Adams
2017-11-07 22:53 ` Bob Proulx
2017-11-07 23:15 ` Jean-Christophe Helary
2017-11-08 4:27 ` Bob Proulx
2017-11-08 5:29 ` Jean-Christophe Helary
2017-11-08 18:50 ` Bob Proulx
2017-11-07 17:53 ` Stefan Monnier
2017-11-07 22:59 ` Jean-Christophe Helary
2017-11-12 20:02 ` Tomas Nordin
2017-11-12 22:13 ` Emanuel Berg
2017-11-13 21:17 ` Tomas Nordin
2017-11-13 22:13 ` Emanuel Berg
2017-11-20 3:24 ` Emanuel Berg [this message]
2017-11-15 14:48 ` Emanuel Berg
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