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Re: Performance issue of 'git branch'

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From: Linus Torvalds
Subject: Re: Performance issue of 'git branch'
Date: Friday, July 24, 2009 - 1:36 pm

On Thu, 23 Jul 2009, Carlos R. Mafra wrote:

Btw, I think 0.61s is still too much. Can you send me the output of 
'strace -Ttt' on your machine?

It's entirely possible that it's all the actual binary (and shared 
library) loading, of course. You do have a slow harddisk. But it takes 
0.035s for me, and I'm wondering if there is something else than just CPU 
speed and IO speed accounting for the 20x performance difference.

(That said, maybe 20x is right - my SSD latency almost certainly is 20x 
better).

			Linus
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Messages in current thread:
Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 4:59 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 5:21 pm)
Re: Performance issue of 'git branch', SZEDER =?iso-8859-1? ..., (Wed Jul 22, 5:23 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 5:51 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 5:55 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 6:22 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 7:02 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 7:20 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 7:23 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 7:25 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 7:28 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 8:08 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 8:18 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 8:21 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 8:27 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 8:40 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 8:47 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 9:10 pm)
Re: Performance issue of 'git branch', Junio C Hamano, (Wed Jul 22, 9:40 pm)
Re: Performance issue of 'git branch', Junio C Hamano, (Wed Jul 22, 10:13 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Wed Jul 22, 10:17 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Wed Jul 22, 10:36 pm)
Re: Performance issue of 'git branch', Junio C Hamano, (Wed Jul 22, 10:52 pm)
Re: Performance issue of 'git branch', Junio C Hamano, (Wed Jul 22, 11:04 pm)
Re: Performance issue of 'git branch', Jakub Narebski, (Thu Jul 23, 5:42 am)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Thu Jul 23, 7:45 am)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Thu Jul 23, 9:07 am)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 9:19 am)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 9:25 am)
Re: Performance issue of 'git branch', Anders Kaseorg, (Thu Jul 23, 9:48 am)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Thu Jul 23, 9:53 am)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 10:19 am)
Re: Performance issue of 'git branch', Tony Finch, (Thu Jul 23, 10:47 am)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 11:57 am)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Thu Jul 23, 12:03 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 12:05 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Thu Jul 23, 12:13 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Thu Jul 23, 12:55 pm)
Newton-Raphson, was Re: Performance issue of 'git branch', Tony Finch, (Thu Jul 23, 3:48 pm)
Re: Newton-Raphson, was Re: Performance issue of 'git branch', Johannes Schindelin, (Thu Jul 23, 4:24 pm)
Re: Newton-Raphson, was Re: Performance issue of 'git branch', Tony Finch, (Thu Jul 23, 4:50 pm)
Re: Newton-Raphson, was Re: Performance issue of 'git branch', Johannes Schindelin, (Thu Jul 23, 5:43 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 1:36 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 1:47 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 2:21 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 3:13 pm)
Re: Performance issue of 'git branch', david, (Fri Jul 24, 3:18 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 3:42 pm)
Re: Performance issue of 'git branch', david, (Fri Jul 24, 3:46 pm)
Re: Performance issue of 'git branch', Theodore Tso, (Fri Jul 24, 3:54 pm)
Re: Performance issue of 'git branch', Shawn O. Pearce, (Fri Jul 24, 3:59 pm)
Re: Performance issue of 'git branch', Junio C Hamano, (Fri Jul 24, 4:28 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Fri Jul 24, 4:46 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Fri Jul 24, 5:41 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Fri Jul 24, 7:39 pm)
Re: Performance issue of 'git branch', Daniel Barkalow, (Fri Jul 24, 7:53 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Sat Jul 25, 11:04 am)
Re: Performance issue of 'git branch', Timo Hirvonen, (Sat Jul 25, 11:57 am)
Re: Performance issue of 'git branch', Reece Dunn, (Sat Jul 25, 12:06 pm)
Re: Performance issue of 'git branch', Mike Hommey, (Sat Jul 25, 1:31 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Sat Jul 25, 2:02 pm)
Re: Performance issue of 'git branch', Carlos R. Mafra, (Sat Jul 25, 2:04 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Sat Jul 25, 2:13 pm)
Re: Performance issue of 'git branch', Johannes Schindelin, (Sat Jul 25, 4:23 pm)
Re: Performance issue of 'git branch', Linus Torvalds, (Sat Jul 25, 9:49 pm)
Re: Performance issue of 'git branch', Mike Hommey, (Sun Jul 26, 12:54 am)
Re: Performance issue of 'git branch', Johannes Schindelin, (Sun Jul 26, 3:16 am)
Re: Performance issue of 'git branch', demerphq, (Sun Jul 26, 3:23 am)
Re: Performance issue of 'git branch', demerphq, (Sun Jul 26, 3:27 am)
Re: Performance issue of 'git branch', Theodore Tso, (Sun Jul 26, 9:29 am)
Re: Performance issue of 'git branch', Avi Kivity, (Sun Jul 26, 10:07 am)
Re: Performance issue of 'git branch', Johannes Schindelin, (Sun Jul 26, 10:16 am)
Re: Performance issue of 'git branch', Jeff King, (Thu Aug 6, 9:21 pm)