From: "René Scharfe" <l.s.r@web.de>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Cc: git@vger.kernel.org, "Junio C Hamano" <gitster@pobox.com>,
"Rohit Ashiwal" <rohit.ashiwal265@gmail.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Jeff King" <peff@peff.net>,
"brian m . carlson" <sandals@crustytoothpaste.net>
Subject: Re: [PATCH v3 0/5] Avoid spawning gzip in git archive
Date: Tue, 14 Jun 2022 22:05:07 +0200 [thread overview]
Message-ID: <0aa5c101-06bf-325c-efbc-6b4ef38616c5@web.de> (raw)
In-Reply-To: <nycvar.QRO.7.76.6.2206141043150.353@tvgsbejvaqbjf.bet>
Am 14.06.22 um 13:28 schrieb Johannes Schindelin:
>
> By the way, the main reason why I did not work more is that in
> http://madler.net/pipermail/zlib-devel_madler.net/2019-December/003308.html,
> Mark Adler (the zlib maintainer) announced that...
>
>> [...] There are many well-tested performance improvements in zlib
>> waiting in the wings that will be incorporated over the next several
>> months. [...]
>
> This was in December 2019. And now it's June 2022 and I kind of wonder
> whether those promised improvements will still come.
>
> In the meantime, however, a viable alternative seems to have cropped up:
> https://github.com/zlib-ng/zlib-ng. Essentially, it looks as if it is what
> zlib should have become after above-quoted announcement.
>
> In particular the CPU intrinsics support (think MMX, SSE2/3, etc) seem to
> be very interesting and I would not be completely surprised if building
> Git with your patches and linking against zlib-ng would paint a very
> favorable picture not only in terms of CPU time but also in terms of
> wallclock time. Sadly, I have not been able to set aside time to look into
> that angle, but maybe I can peak your interest?
I was unable to preload zlib-ng using DYLD_INSERT_LIBRARIES on macOS
12.4 so far. The included demo proggy looks impressive, though:
$ hyperfine -w3 -L gzip gzip,../zlib-ng/minigzip "git -C ../linux archive --format=tar HEAD | {gzip} -c"
Benchmark #1: git -C ../linux archive --format=tar HEAD | gzip -c
Time (mean ± σ): 20.424 s ± 0.006 s [User: 23.964 s, System: 0.432 s]
Range (min … max): 20.414 s … 20.434 s 10 runs
Benchmark #2: git -C ../linux archive --format=tar HEAD | ../zlib-ng/minigzip -c
Time (mean ± σ): 12.158 s ± 0.006 s [User: 13.908 s, System: 0.376 s]
Range (min … max): 12.145 s … 12.166 s 10 runs
Summary
'git -C ../linux archive --format=tar HEAD | ../zlib-ng/minigzip -c' ran
1.68 ± 0.00 times faster than 'git -C ../linux archive --format=tar HEAD | gzip -c'
next prev parent reply other threads:[~2022-06-14 20:05 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-12 23:04 [PATCH 0/2] Avoid spawning gzip in git archive Johannes Schindelin via GitGitGadget
2019-04-12 23:04 ` [PATCH 1/2] archive: replace write_or_die() calls with write_block_or_die() Rohit Ashiwal via GitGitGadget
2019-04-13 1:34 ` Jeff King
2019-04-13 5:51 ` Junio C Hamano
2019-04-14 4:36 ` Rohit Ashiwal
2019-04-26 14:29 ` Johannes Schindelin
2019-04-26 23:44 ` Junio C Hamano
2019-04-29 21:32 ` Johannes Schindelin
2019-05-01 18:09 ` Jeff King
2019-05-02 20:29 ` René Scharfe
2019-05-05 5:25 ` Junio C Hamano
2019-05-06 5:07 ` Jeff King
2019-04-14 4:34 ` Rohit Ashiwal
2019-04-14 10:33 ` Junio C Hamano
2019-04-26 14:28 ` Johannes Schindelin
2019-05-01 18:07 ` Jeff King
2019-04-12 23:04 ` [PATCH 2/2] archive: avoid spawning `gzip` Rohit Ashiwal via GitGitGadget
2019-04-13 1:51 ` Jeff King
2019-04-13 22:01 ` René Scharfe
2019-04-15 21:35 ` Jeff King
2019-04-26 14:51 ` Johannes Schindelin
2019-04-27 9:59 ` René Scharfe
2019-04-27 17:39 ` René Scharfe
2019-04-29 21:25 ` Johannes Schindelin
2019-05-01 17:45 ` René Scharfe
2019-05-01 18:18 ` Jeff King
2019-06-10 10:44 ` René Scharfe
2019-06-13 19:16 ` Jeff King
2019-04-13 22:16 ` brian m. carlson
2019-04-15 21:36 ` Jeff King
2019-04-26 14:54 ` Johannes Schindelin
2019-05-02 20:20 ` Ævar Arnfjörð Bjarmason
2019-05-03 20:49 ` Johannes Schindelin
2019-05-03 20:52 ` Jeff King
2019-04-26 14:47 ` Johannes Schindelin
[not found] ` <pull.145.v2.git.gitgitgadget@gmail.com>
[not found] ` <4ea94a8784876c3a19e387537edd81a957fc692c.1556321244.git.gitgitgadget@gmail.com>
2019-05-02 20:29 ` [PATCH v2 3/4] archive: optionally use zlib directly for gzip compression René Scharfe
[not found] ` <ac2b2488a1b42b3caf8a84594c48eca796748e59.1556321244.git.gitgitgadget@gmail.com>
2019-05-02 20:30 ` [PATCH v2 2/4] archive-tar: mark RECORDSIZE/BLOCKSIZE as unsigned René Scharfe
2019-05-08 11:45 ` Johannes Schindelin
2019-05-08 23:04 ` Jeff King
2019-05-09 14:06 ` Johannes Schindelin
2019-05-09 18:38 ` Jeff King
2019-05-10 17:18 ` René Scharfe
2019-05-10 21:20 ` Jeff King
2022-06-12 6:00 ` [PATCH v3 0/5] Avoid spawning gzip in git archive René Scharfe
2022-06-12 6:03 ` [PATCH v3 1/5] archive: rename archiver data field to filter_command René Scharfe
2022-06-12 6:05 ` [PATCH v3 2/5] archive-tar: factor out write_block() René Scharfe
2022-06-12 6:08 ` [PATCH v3 3/5] archive-tar: add internal gzip implementation René Scharfe
2022-06-13 19:10 ` Junio C Hamano
2022-06-12 6:18 ` [PATCH v3 4/5] archive-tar: use OS_CODE 3 (Unix) for internal gzip René Scharfe
2022-06-12 6:19 ` [PATCH v3 5/5] archive-tar: use internal gzip by default René Scharfe
2022-06-13 21:55 ` Junio C Hamano
2022-06-14 11:27 ` Johannes Schindelin
2022-06-14 15:47 ` René Scharfe
2022-06-14 15:56 ` René Scharfe
2022-06-14 16:29 ` Johannes Schindelin
2022-06-14 20:04 ` René Scharfe
2022-06-15 16:41 ` Junio C Hamano
2022-06-14 11:28 ` [PATCH v3 0/5] Avoid spawning gzip in git archive Johannes Schindelin
2022-06-14 20:05 ` René Scharfe [this message]
2022-06-30 18:55 ` Johannes Schindelin
2022-07-01 16:05 ` Johannes Schindelin
2022-07-01 16:27 ` Jeff King
2022-07-01 17:47 ` Junio C Hamano
2022-06-15 16:53 ` [PATCH v4 0/6] " René Scharfe
2022-06-15 16:58 ` [PATCH v4 1/6] archive: update format documentation René Scharfe
2022-06-15 16:59 ` [PATCH v4 2/6] archive: rename archiver data field to filter_command René Scharfe
2022-06-15 17:01 ` [PATCH v4 3/6] archive-tar: factor out write_block() René Scharfe
2022-06-15 17:02 ` [PATCH v4 4/6] archive-tar: add internal gzip implementation René Scharfe
2022-06-15 20:32 ` Ævar Arnfjörð Bjarmason
2022-06-16 18:55 ` René Scharfe
2022-06-24 11:13 ` Ævar Arnfjörð Bjarmason
2022-06-24 20:24 ` René Scharfe
2022-06-15 17:04 ` [PATCH v4 5/6] archive-tar: use OS_CODE 3 (Unix) for internal gzip René Scharfe
2022-06-15 17:05 ` [PATCH v4 6/6] archive-tar: use internal gzip by default René Scharfe
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