Re: Cloning speed comparison

From: Daniel Barkalow <barkalow@iabervon.org>
Date: Aug 15, 2005, 21:27 UTC
Message-ID: <Pine.LNX.4.63.0508151652290.21501@iabervon.org>
In-Reply-To: <7vacjjx70u.fsf@assigned-by-dhcp.cox.net>

On Mon, 15 Aug 2005, Junio C Hamano wrote:

Show 14 quoted lines

> Daniel Barkalow <barkalow@iabervon.org> writes:
> 
> > I should be able to get http-pull down to the neighborhood of 
> > (current) ssh-pull; http-pull is that slow (when the source repository 
> > isn't packed) because it's entirely sequential, rather than overlapping 
> > requests like ssh-pull now does.
> 
> I like those prefetch() and process() code in pull.c very much.
> 
> I have been wondering if increasing parallelism more by
> prefetching beyond the immediate parents of the current commit,
> in "if (get_history)" part of process_commit().  Maybe it is not
> worth it because doing a commit, its associated tree(s) and its
> parents would already give us enough parallelism already.

It is actually already maxing out the parallelism; it has a FIFO of objects which it needs, and calls prefetch() when it enqueues an object and fetch() when it dequeues it. It only cares about the dependancies for this purpose, not the types.

	-Daniel
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