From: Michael Albinus <michael.albinus@gmx.de>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: "Eli Zaretskii" <eliz@gnu.org>,
emacs-devel@gnu.org, "Andreas Schwab" <schwab@linux-m68k.org>,
"Stefan Monnier" <monnier@iro.umontreal.ca>,
"Kévin Le Gouguec" <kevin.legouguec@gmail.com>
Subject: Re: master e315544: ; * src/fileio.c (Fdirectory_append): Doc fix.
Date: Wed, 28 Jul 2021 19:28:54 +0200 [thread overview]
Message-ID: <87r1fis5yh.fsf@gmx.de> (raw)
In-Reply-To: <87bl6mbg7e.fsf@gnus.org> (Lars Ingebrigtsen's message of "Wed, 28 Jul 2021 17:39:33 +0200")
Lars Ingebrigtsen <larsi@gnus.org> writes:
Hi Lars,
>>> This should probably emphasize the fact that it ignores file name
>>> handlers.
>>
>> The NEWS entry specifically, or the docstring and/or info entry?
>
> I'm not entirely confident that it'll keep ignoring file name handlers,
> so the less said the better.
If you want file-name-concat being well optimized, you shall not use
file name handlers:
--8<---------------cut here---------------start------------->8---
(benchmark
1000
(let (file-name-handlers)
(concat (file-name-as-directory "/tmp") "foo")))
=> "Elapsed time: -0.000004s"
(benchmark
1000
(let nil
(concat (file-name-as-directory "/tmp") "foo")))
=> "Elapsed time: 0.000049s"
--8<---------------cut here---------------end--------------->8---
It's not heavy in terms of absolute time, but still a factor of 10.
Best regards, Michael.
next prev parent reply other threads:[~2021-07-28 17:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210724171858.1726.43078@vcs0.savannah.gnu.org>
[not found] ` <20210724171900.4A26D20D0A@vcs0.savannah.gnu.org>
2021-07-24 18:39 ` master e315544: ; * src/fileio.c (Fdirectory_append): Doc fix Michael Albinus
2021-07-24 18:51 ` Lars Ingebrigtsen
2021-07-24 19:04 ` Michael Albinus
2021-07-25 5:19 ` Lars Ingebrigtsen
2021-07-25 5:27 ` Stefan Monnier
2021-07-25 6:54 ` Lars Ingebrigtsen
2021-07-25 10:01 ` Kévin Le Gouguec
2021-07-25 10:23 ` Lars Ingebrigtsen
2021-07-25 11:50 ` Andreas Schwab
2021-07-25 13:05 ` Kévin Le Gouguec
2021-07-28 15:39 ` Lars Ingebrigtsen
2021-07-28 17:28 ` Michael Albinus [this message]
2021-07-30 11:36 ` Lars Ingebrigtsen
2021-07-25 7:59 ` Michael Albinus
2021-07-28 15:36 ` Lars Ingebrigtsen
2021-07-28 17:13 ` Michael Albinus
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