From: Taylor Blau <me@ttaylorr.com>
To: Jeff King <peff@peff.net>
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Blake Burkhart" <bburky@bburky.com>,
"Junio C Hamano" <gitster@pobox.com>, git <git@vger.kernel.org>
Subject: Re: [PATCH 1/6] add open_nofollow() helper
Date: Tue, 16 Feb 2021 10:44:00 -0500 [thread overview]
Message-ID: <YCvoQBhmCeeR9Cup@nand.local> (raw)
In-Reply-To: <YCvcoPnDAEWNcv+h@coredump.intra.peff.net>
On Tue, Feb 16, 2021 at 09:54:24AM -0500, Jeff King wrote:
> This is all on Linux, of course. Perhaps other systems with slower
> syscalls may be more impacted.
I timed it on macOS, which (as you know) I don't use for daily
development, but it's a useful testbed from time to time.
On your branch, 'git check-attr -a' took 193.4ms with O_NOFOLLOW, and
245.3ms without. After touching every .gitattributes file, those numbers
shot up to 340.9ms and 346.6ms, respectively.
(All numbers on linux.git, of course).
There isn't an apples-to-apples comparison between my numbers and yours
(since my laptop is much slower than yours), but the relative numbers
are quite clear that only doing a single syscall is worth it in the
non-pathological case.
Thanks,
Taylor
next prev parent reply other threads:[~2021-02-16 15:45 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-13 17:49 Limited local file inclusion with .mailmap symlinks and git-archive Blake Burkhart
2021-02-15 23:17 ` Jeff King
2021-02-15 23:18 ` [PATCH 1/2] fsck: make symlinked .gitignore and .gitattributes a warning Jeff King
2021-02-16 0:38 ` Ævar Arnfjörð Bjarmason
2021-02-16 1:16 ` Jeff King
2021-02-16 1:56 ` Junio C Hamano
2021-02-16 12:54 ` Jeff King
2021-02-16 12:48 ` Jeff King
2021-02-16 14:43 ` [PATCH 0/6] open in-tree files with O_NOFOLLOW Jeff King
2021-02-16 14:44 ` [PATCH 1/6] add open_nofollow() helper Jeff King
2021-02-16 14:54 ` Jeff King
2021-02-16 15:44 ` Taylor Blau [this message]
2021-02-16 16:02 ` Jeff King
2021-02-16 16:07 ` Taylor Blau
2021-02-16 16:11 ` Taylor Blau
2021-02-16 16:19 ` Jeff King
2021-02-16 14:44 ` [PATCH 2/6] attr: convert "macro_ok" into a flags field Jeff King
2021-02-16 14:44 ` [PATCH 3/6] exclude: add flags parameter to add_patterns() Jeff King
2021-02-16 14:44 ` [PATCH 4/6] attr: do not respect symlinks for in-tree .gitattributes Jeff King
2021-02-16 14:44 ` [PATCH 5/6] exclude: do not respect symlinks for in-tree .gitignore Jeff King
2021-02-16 14:44 ` [PATCH 6/6] mailmap: do not respect symlinks for in-tree .mailmap Jeff King
2021-02-16 14:57 ` Jeff King
2021-02-25 19:25 ` [PATCH 0/6] open in-tree files with O_NOFOLLOW Junio C Hamano
2021-02-26 6:35 ` Jeff King
2021-02-15 23:19 ` [PATCH 2/2] disallow symlinked .mailmap files Jeff King
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