Re: Huge performance bottleneck reading packs

From: Vegard Nossum <vegard.nossum@oracle.com>
Date: Oct 14, 2016, 06:55 UTC
Message-ID: <0e4173b6-8fbb-4223-b061-524c7ebfd4d7@oracle.com>
In-Reply-To: <20161013204351.rezqssvw63343l4g@sigill.intra.peff.net>

On 10/13/2016 10:43 PM, Jeff King wrote:

Show 5 quoted lines

> No problem. I do think you'll benefit a lot from packing everything into
> a single pack, but it's also clear that Git was doing more work than it
> needed to be. This was a known issue when we added the racy-check to
> has_sha1_file(), and knew that we might have to field reports like this
> one.

After 'git gc' (with the .5G limit) I have 23 packs and with your patch I now get:

$ time git fetch

real 0m26.520s user 0m3.580s sys 0m0.636s

Thanks!

vegard