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From: Matheus Tavares <matheus.bernardino@usp.br>
To: git@vger.kernel.org
Cc: "Stefan Zager" <szager@chromium.org>,
	"Stefan Zager" <szager@google.com>,
	"Zachary Turner" <zturner@chromium.org>,
	"Robin H . Johnson" <robbat2@gentoo.org>,
	"brian m . carlson" <sandals@crustytoothpaste.net>,
	"David Kastrup" <dak@gnu.org>, "Duy Nguyen" <pclouds@gmail.com>,
	"Alfredo Goldman" <gold@ime.usp.br>,
	"Thomas Gummerer" <t.gummerer@gmail.com>,
	"Оля Тележная" <olyatelezhnaya@gmail.com>,
	"Elijah Newren" <newren@gmail.com>,
	"Christian Couder" <christian.couder@gmail.com>
Subject: Re: Make the git codebase thread-safe
Date: Mon,  1 Apr 2019 21:52:45 -0300	[thread overview]
Message-ID: <20190402005245.4983-1-matheus.bernardino@usp.br> (raw)
In-Reply-To: <CA+TurHgyUK5sfCKrK+3xY8AeOg0t66vEvFxX=JiA9wXww7eZXQ@mail.gmail.com>

Hi,

I am planning to work on making pack access thread-safe as my GSoC
project, and after that, parallelize git blame or checkout. Or even use
the thread-safe pack access to improve the already parallel grep or
pack-objects.

With this in mind, I would like to know if the problem discussed in this
thread[1] is still an issue on the repos you folks work with (gentoo,
chromium, etc.). And also, could you please let me know which git
commands did you find to me more problematic in them, nowadays?

I downloaded chromium to give it a try and got (on a machine with i7 and
SSD, running Manjaro Linux):

- 17s on blame for a file with long history[2]
- 2m on blame for a huge file[3]
- 15s on log for both [2] and [3]
- 1s for git status

It seems quite a lot, especially with SSD, IMO.

[1] https://public-inbox.org/git/CA+TurHgyUK5sfCKrK+3xY8AeOg0t66vEvFxX=JiA9wXww7eZXQ@mail.gmail.com/
[2] ./chrome/browser/about_flags.cc (same with ./DEPS)
[3] third_party/sqlite/amalgamation/sqlite3.c (7.5M)

Best,
Matheus Tavares

  parent reply	other threads:[~2019-04-02  0:53 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-12  1:54 Make the git codebase thread-safe Stefan Zager
2014-02-12  2:02 ` Robin H. Johnson
2014-02-12  3:43   ` Duy Nguyen
2014-02-12 11:00     ` Karsten Blees
2014-02-12 23:03       ` Mike Hommey
2014-02-13  0:06         ` Karsten Blees
2014-02-12 18:15     ` Stefan Zager
2014-02-12  2:11 ` Duy Nguyen
2014-02-12 18:12   ` Stefan Zager
2014-02-12 18:33     ` Matthieu Moy
2014-02-12 18:39       ` Stefan Zager
2014-02-12 18:50     ` David Kastrup
2014-02-12 19:02       ` Stefan Zager
2014-02-12 19:15         ` David Kastrup
2014-02-12 23:09           ` Mike Hommey
2014-02-13  6:04             ` David Kastrup
2014-02-13  9:34               ` Mike Hommey
2014-02-13  9:48                 ` Mike Hommey
2014-02-13  8:30           ` David Kastrup
2014-02-12 20:06     ` Junio C Hamano
2014-02-12 20:27       ` Stefan Zager
2014-02-12 23:05         ` Junio C Hamano
2014-02-12 11:59 ` Erik Faye-Lund
2014-02-12 18:20   ` Stefan Zager
2014-02-12 18:27     ` Erik Faye-Lund
2014-02-12 18:34       ` Stefan Zager
2014-02-12 18:37         ` Erik Faye-Lund
2014-02-12 19:22           ` Karsten Blees
2014-02-12 19:30             ` Stefan Zager
2014-02-13  8:27               ` Johannes Sixt
2014-02-13  8:38                 ` David Kastrup
2014-02-13 18:40                 ` Stefan Zager
2014-02-13 18:38             ` Zachary Turner
2014-02-13 22:51               ` Karsten Blees
2014-02-13 22:53                 ` Stefan Zager
2014-02-13 23:09                   ` Zachary Turner
2014-02-14 19:04                     ` Karsten Blees
     [not found]                       ` <CAAErz9g7ND1htfk=yxRJJLbSEgBi4EV_AHC9uDRptugGWFWcXw@mail.gmail.com>
2014-02-14 19:16                         ` Zachary Turner
2014-02-14 23:10                           ` Karsten Blees
2014-02-15  0:45                           ` Duy Nguyen
2014-02-15  0:50                             ` Stefan Zager
2014-02-15  0:56                               ` Duy Nguyen
2014-02-15  1:15                                 ` Zachary Turner
2014-02-15  1:39                                   ` Duy Nguyen
2014-02-18 17:55                                     ` Junio C Hamano
2014-02-18 18:14                                       ` Zachary Turner
2014-02-14 19:52                         ` Stefan Zager
2014-02-14 21:49                       ` Stefan Zager
2014-02-13  1:42 ` brian m. carlson
2019-04-02  0:52 ` Matheus Tavares [this message]
2019-04-02  1:07   ` Duy Nguyen
2019-04-02 10:30     ` David Kastrup
2019-04-02 11:35       ` Duy Nguyen
2019-04-02 11:52         ` David Kastrup
2019-04-02 19:06     ` Matheus Tavares Bernardino

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