From: Carlos R. Mafra <crmafra2@gmail.com>
Date: Thu, 23 Jul 2009 19:55:48 GMT
Subject: Re: Performance issue of 'git branch'
Message-ID: <20090723195548.GA28494@Pilar.aei.mpg.de>
In-Reply-To: <alpine.LFD.2.01.0907231212180.21520@localhost.localdomain>

On Thu 23.Jul'09 at 12:13:41 -0700, Linus Torvalds wrote:
> > It will still do _some_ object lookups. In particular, it will do the HEAD 
> > lookup in 'print_ref_list()', even if it's not strictly necessary. But it 
> > should cut down the noise further.
> 
> And this (on top of them all) will basically avoid even that one.

Ok, I applied (both) on top of the first one.

After 7 tests I got these, 

time:

      0.61 +/- 0.08

GIT_DEBUG_LOOKUP=1 git branch |wc -l
    
      9
      
which are in fact only the branches list.

Compared to yesterday, that is a huge improvement (0.6s vs 5.7s)
and (9 vs 2200+). At least for me 0.6s is "instantaneous", so
the issue is really gone.

Thanks a lot to everyone!