From: Mitchel Humpherys <mitch.special@gmail.com>
Date: Wed, 21 May 2014 00:13:34 GMT
Subject: Re: Why is --graph --max-count=n so much slower than --graph HEAD~n..?
Message-ID: <vnkw4n0kat01.fsf@mitchelh-linux.qualcomm.com>
In-Reply-To: <xmqq61l0rrng.fsf@gitster.dls.corp.google.com>

On Tue, May 20 2014 at 03:50:43 PM, Junio C Hamano <gitster@pobox.com> wrote:
> Mitchel Humpherys <mitch.special@gmail.com> writes:
>
>> I've noticed that --max-count doesn't seem to speed up `git log --graph'
>> computation time.
>
> AFAIK, --graph wants to compute the whole history and the max-count
> only affects the output phase after --graph does its computation.
>
> Besides, "log --max-count=n" and "log HEAD~n.." compute completely
> different things, so the comparison is apples and oranges.

Yes, apples and oranges in a black box :). I provided the
HEAD~n.. measurements just to show that we can get (almost) the exact
same output another way and it's much faster. It just "seems like"
--max-count=n should speed things up as n decreases...


-- 
Mitch