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From: David Barr <david.barr@cordelta.com>
To: Sverre Rabbelier <srabbelier@gmail.com>
Cc: Jonathan Nieder <jrnieder@gmail.com>,
	Git Mailing List <git@vger.kernel.org>,
	Ramkumar Ramachandra <artagnon@gmail.com>
Subject: Re: [PATCH] fast-import: Allow filemodify to set the root
Date: Fri, 8 Oct 2010 10:45:46 +1100	[thread overview]
Message-ID: <201010081045.46642.david.barr@cordelta.com> (raw)
In-Reply-To: <AANLkTi=K0NsKB0uBpHs+mB=PubieX7jO7vFiqrs+dnqB@mail.gmail.com>

Hi,

> | For a command (like filter-branch --subdirectory-filter) that wants
> | to commit a lot of trees that already exist in the object db, writing
> | undeltified objects as loose files only to repack them later can
> | involve a significant amount[*] of overhead.

> [*] how significant?  Numbers are always nice. :)

Using git hash-object:
real    2m51.748s
user    0m25.460s
sys     0m23.890s

Using git fast-import:
real    2m13.337s
user    0m28.010s
sys     0m18.100s

> 
> > Ok, so maybe I do understand, is it basically 'git read-tree
> > 4b825dc642cb6eb9a060e54bf8d69288fbee4904' for fast-import?

> Perhaps mention that in the commit message as well then. Of course,
> the fast-import doc needs updating, and it needs test.

| is a synonym for the deleteall command and the fast-import equivalent of
| 
|         git read-tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904

--
David Barr

  reply	other threads:[~2010-10-07 23:46 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-07 10:55 [PATCH] fast-import: Allow filemodify to set the root David Barr
2010-10-07 13:58 ` Sverre Rabbelier
2010-10-07 20:28   ` Jonathan Nieder
2010-10-07 20:35     ` Sverre Rabbelier
2010-10-07 23:45       ` David Barr [this message]
2010-10-07 23:46         ` David Barr
2010-10-07 23:55           ` Sverre Rabbelier
2010-10-08  6:50     ` Johannes Sixt
2010-10-08  7:05       ` Jonathan Nieder
2010-10-08  7:23         ` Johannes Sixt
2010-10-08  8:00           ` Jonathan Nieder
2010-10-08  8:15 ` Ramkumar Ramachandra
2010-10-08  8:33   ` Gabriel Filion
2010-10-08  8:58     ` David Michael Barr
2010-10-08 16:34       ` Sverre Rabbelier
2010-10-08 17:09         ` Jonathan Nieder
2010-10-09 22:11           ` David Michael Barr
2010-10-09 22:12             ` Sverre Rabbelier
2010-10-10  3:30               ` David Barr
2010-10-11  6:34                 ` Jonathan Nieder
2010-10-18  1:00                   ` [PATCH 0/2] " Jonathan Nieder
2010-10-18  1:03                     ` [PATCH 1/2] fast-import: filemodify after M 040000 <tree> "" crashes Jonathan Nieder
2010-10-18  1:13                       ` Sverre Rabbelier
2010-10-18  1:44                         ` Jonathan Nieder
2010-10-20 20:25                       ` [PATCH] fast-import: do not clear notes in do_change_note_fanout() Jonathan Nieder
2010-10-18  1:08                     ` [PATCH 2/2] fast-import: tighten M 040000 syntax Jonathan Nieder
2011-01-16  2:22                 ` [PATCH] Documentation/fast-import: put explanation of M 040000 <dataref> "" in context Jonathan Nieder
2011-01-18 15:04                   ` Junio C Hamano
2011-01-18 21:16                     ` Jonathan Nieder
2011-01-18 21:43                       ` Junio C Hamano
2011-01-18 22:02                         ` Jonathan Nieder

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