From: Eli Zaretskii <eliz@gnu.org>
To: "Clément Pit-Claudel" <cpitclaudel@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Why does adding a useless copy-sequence and discarding the result make my ELisp 40 times faster?
Date: Sat, 25 Mar 2017 10:05:48 +0300 [thread overview]
Message-ID: <83vaqxbzub.fsf@gnu.org> (raw)
In-Reply-To: <77900613-3b45-52f4-5770-38fe6f27e69c@gmail.com> (message from Clément Pit-Claudel on Sat, 25 Mar 2017 00:24:20 -0400)
> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
> Date: Sat, 25 Mar 2017 00:24:20 -0400
>
> On 2017-03-25 00:06, Clément Pit-Claudel wrote:
> > * Why does running additional, supposedly useless code speed things up so much? (1)
>
> Interestingly, it turns out that (copy-sequence) isn't needed: instead, it's enough to use (sleep-for 0.000001) (or even (sleep-for cl-least-positive-normalized-float)) to get the 40x speedup.
Because, if you don't sleep, the process is not yet running by the
time you get to process-send-string, and then Emacs waits for a much
longer time for it to become running?
next prev parent reply other threads:[~2017-03-25 7:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-25 4:06 Why does adding a useless copy-sequence and discarding the result make my ELisp 40 times faster? Clément Pit-Claudel
2017-03-25 4:24 ` Clément Pit-Claudel
2017-03-25 7:05 ` Eli Zaretskii [this message]
2017-03-25 10:38 ` Andreas Politz
2017-03-25 13:49 ` Clément Pit-Claudel
2017-03-25 16:38 ` Andreas Politz
2017-03-25 17:02 ` Clément Pit-Claudel
2017-03-25 17:26 ` Eli Zaretskii
2017-03-25 17:40 ` Andreas Politz
2017-03-25 17:49 ` Eli Zaretskii
2017-03-25 17:37 ` Andreas Politz
2017-03-25 13:45 ` Clément Pit-Claudel
2017-03-25 10:47 ` Andreas Politz
2017-03-25 13:54 ` Clément Pit-Claudel
2017-03-26 13:14 ` Stephen Leake
2017-03-26 13:35 ` Clément Pit-Claudel
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