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From: Matheus Tavares Bernardino <matheus.bernardino@usp.br>
To: Duy Nguyen <pclouds@gmail.com>
Cc: "Git Mailing List" <git@vger.kernel.org>,
	"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>,
	"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: Tue, 2 Apr 2019 16:06:57 -0300	[thread overview]
Message-ID: <CAHd-oW5K5VrbhfYw+-bWmYXbysH1z8b2kSuDvxhPKBXgXj=KXw@mail.gmail.com> (raw)
In-Reply-To: <CACsJy8BSDz1JO+w1N9w2W1zxY+EWTxiU6yB_V0eeOD--g-TzeA@mail.gmail.com>

On Mon, Apr 1, 2019 at 10:07 PM Duy Nguyen <pclouds@gmail.com> wrote:
>
> On Tue, Apr 2, 2019 at 7:52 AM Matheus Tavares
> <matheus.bernardino@usp.br> wrote:
> > 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.
>
> There have been a couple of optimizations that are probably still not
> enabled by default because they only benefit large repos. So you may
> want to check and turn them on before measuring anything:
> commit-graph, pack bitmap, untracked cache or fsmonitor. All these
> should be mentioned in 'git help config' (as starting point). Also
> search "threads" in that man page because some commands may have multi
> threads support but disabled by default for the same reason.

Nice, thanks for the suggestions!

> From your command list though, I think you might get the same results
> (maybe with a bit faster 'git status') even with all optimizations on.

Yes, you were right. With the optimizations on, I got the following
times on those same files:

- 17~18s on blame for about_flags.cc
- 1m50s~2m on blame for sqlite3.c
- 15s on log for both
- 0.3~0.5s on git status

> --
> Duy

      parent reply	other threads:[~2019-04-02 19:07 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
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 [this message]

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