From: Duy Nguyen <pclouds@gmail.com>
Date: Thu, 19 Jul 2018 05:41:03 GMT
Subject: Re: 2.18.0 Regression: packing performance and effectiveness
Message-ID: <CACsJy8Cc=h3ptDaW=oUGXqRZAvNU8-pUCe1cVFpRd0t8O1a0Gw@mail.gmail.com>
In-Reply-To: <20180718225110.17639-1-newren@gmail.com>

On Thu, Jul 19, 2018 at 12:51 AM Elijah Newren <newren@gmail.com> wrote:
>
> I had a user report some poor behavior of 'git gc --aggressive' on a
> certain repo (which I sadly cannot share).  Turns out that on this
> repo, this operation takes about 60% longer and produces a pack
> roughly twice the expected size.

The intention was to make life better for weaker machines but
definitely should not slow down beefier ones, so yes this is
definitely a regression.

Is it possible to share "verify-pack -v <pack file>" output of the
pack produced by 2.17.0 and 2.18.0? The only sensitive info there is
sha-1, which you can replace with just "SHA-1" if you want. I'm more
interested in delta sizes and distribution.
-- 
Duy