From: Philippe De Muyter <phdm@macq.eu>
Date: Thu, 21 May 2015 07:05:23 GMT
Subject: Re: identical hashes on two branches, but holes in git log
Message-ID: <20150521070523.GA8026@frolo.macqel>
In-Reply-To: <20150520161815.GA12521@peff.net>

On Wed, May 20, 2015 at 12:18:15PM -0400, Jeff King wrote:
> On Wed, May 20, 2015 at 04:12:38PM +0200, Philippe De Muyter wrote:
> 
> > After reading the man page of 'git log', should --topo-order not be the
> > default log order ?
> 
> The problem with --topo-order is that it has to traverse all of the
> commits before starting output. So:
> 
>   $ time git log | head -1
>   commit 64fb1d0e975e92e012802d371e417266d6531676
> 
>   real    0m0.038s
>   user    0m0.032s
>   sys     0m0.008s
> 
>   $ time git log --topo-order | head -1
>   commit 64fb1d0e975e92e012802d371e417266d6531676
> 
>   real    0m4.247s
>   user    0m4.140s
>   sys     0m0.108s
> 
> -Peff

So we trade correctness for speed :(

Is there a way to set topo-order as the default log order via git config ?

Is topo-order already implemented as starting with the default order followed
by an ancestor check or does it switch immediately to topological sort ?

Philippe