Re: Efficiency of initial clone from server

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Feb 12, 2007, 11:45 UTC
Message-ID: <Pine.LNX.4.63.0702121241130.22628@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <7vzm7k9c3c.fsf@assigned-by-dhcp.cox.net>

Hi,

On Sun, 11 Feb 2007, Junio C Hamano wrote:

> You are assuming everybody does initial clone all the time.  I do not 
> think that holds true in practice.

It depends how you interpret "all the time". What you (Junio) are suggesting is that the count of initial clones is relatively small as compared to the total number of fetches.

However, you can interpret "all the time" in terms of "time". Most fetches are really small. They even often end up in no objects pulled at all. These are cheap for the server. The initial clones take a long time. They are expensive.

I'd be interested to learn how much of the CPU time is actually spent in initial clones, rather than other types of fetches. It might make sense yet to optimize initial clones.

Ciao, Dscho