From: Linus Torvalds <torvalds@osdl.org>
To: Marco Costalba <mcostalba@gmail.com>
Cc: Git Mailing List <git@vger.kernel.org>,
Junio C Hamano <junkio@cox.net>, Alex Riesen <raa.lkml@gmail.com>,
Shawn Pearce <spearce@spearce.org>
Subject: Re: [RFC \ WISH] Add -o option to git-rev-list
Date: Mon, 11 Dec 2006 09:07:43 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0612110905180.12500@woody.osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0612110855550.12500@woody.osdl.org>
On Mon, 11 Dec 2006, Linus Torvalds wrote:
>
> That's not timing what I asked. That's just timing the "git-rev-list". You
> need to time the "cat" part too. Either use a script, or do something like
>
> time sh -c "git-rev-list ... | cat > /dev/null".
Btw, if you do this, you'll actually see one of the _real_ advantages of
pipes.
On an SMP system, you'll easily get output like "110%CPU", since now the
git-rev-list and the user can run in parallel. Of course, they can do so
with temp-files too, but then you have all the "is it a true EOF, or is it
just the fact that the writer hasn't written everything yet" problem (and
the _normal_ solution for that is to simply not allow any overlapping
work).
next prev parent reply other threads:[~2006-12-11 17:08 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-10 11:38 [RFC \ WISH] Add -o option to git-rev-list Marco Costalba
2006-12-10 14:54 ` Alex Riesen
2006-12-10 18:16 ` Linus Torvalds
2006-12-10 19:51 ` Marco Costalba
2006-12-10 20:00 ` globs in partial checkout? Michael S. Tsirkin
2006-12-10 20:13 ` Linus Torvalds
2006-12-10 21:07 ` Michael S. Tsirkin
2006-12-10 20:08 ` [RFC \ WISH] Add -o option to git-rev-list Linus Torvalds
2006-12-10 20:19 ` Linus Torvalds
2006-12-10 22:05 ` Marco Costalba
2006-12-10 22:09 ` Marco Costalba
2006-12-10 22:16 ` Linus Torvalds
2006-12-10 22:35 ` Marco Costalba
2006-12-10 22:53 ` Linus Torvalds
2006-12-11 0:15 ` Marco Costalba
2006-12-11 0:51 ` Linus Torvalds
2006-12-11 7:17 ` Marco Costalba
2006-12-11 10:00 ` Alex Riesen
2006-12-11 16:59 ` Linus Torvalds
2006-12-11 17:07 ` Linus Torvalds [this message]
2006-12-11 17:39 ` Marco Costalba
2006-12-11 18:15 ` Linus Torvalds
2006-12-11 18:59 ` Marco Costalba
2006-12-11 19:25 ` Linus Torvalds
2006-12-11 20:28 ` Josef Weidendorfer
2006-12-11 20:40 ` Linus Torvalds
2006-12-11 20:54 ` Josef Weidendorfer
2006-12-11 21:14 ` Linus Torvalds
2006-12-15 18:45 ` Marco Costalba
2006-12-15 19:20 ` Linus Torvalds
2006-12-15 20:41 ` Marco Costalba
2006-12-15 21:04 ` Marco Costalba
2006-12-11 9:26 ` Josef Weidendorfer
2006-12-11 12:52 ` Marco Costalba
2006-12-11 13:28 ` Josef Weidendorfer
2006-12-11 17:28 ` Marco Costalba
2006-12-11 11:39 ` Andreas Ericsson
2006-12-11 12:59 ` Marco Costalba
2006-12-11 13:40 ` Andreas Ericsson
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