From: Marco Roeland <marco.roeland@xs4all.nl>
Date: Tue, 19 Dec 2006 08:40:17 GMT
Subject: Re: cloning the kernel - why long time in "Resolving 313037 deltas"
Message-ID: <20061219084017.GB30448@fiberbit.xs4all.nl>
In-Reply-To: <20061219083242.GF2511@spearce.org>

On Tuesday December 19th 2006 at 03:32 Shawn Pearce wrote:

> > Anyway, try the pread() version first, see if that fixes the OS X problem.
> 
> It does.  Without pread() (aka stock 'next') it takes me over an
> hour to index a pack of linux-2.6.  With pread() its 1m6s to run
> index-pack on the same pack file.  The indexes are (of course)
> identically produced.

I see the same here. From an (estimated) time of 37 minutes down to 52
seconds with the pread() patch. Running the profiler (shark) on the old
version showed that 85% of the time was spent in the Mac OS X mmap()
system call.
--