Re: Git and GCC

From: Harvey Harrison <harvey.harrison@gmail.com>
Date: Dec 6, 2007, 04:25 UTC
Message-ID: <1196915112.10408.66.camel@brick>
In-Reply-To: <4aca3dc20712051947t5fbbb383ua1727c652eb25d7e@mail.gmail.com>

I fought with this a few months ago when I did my own clone of gcc svn. My bad for only discussing this on #git at the time. Should have put this to the list as well.

If anyone recalls my report was something along the lines of git gc --aggressive explodes pack size.

git repack -a -d --depth=100 --window=100 produced a ~550MB packfile immediately afterwards a git gc --aggressive produces a 1.5G packfile.

This was for all branches/tags, not just trunk like Daniel's repo.

The best theory I had at the time was that the gc doesn't find as good deltas or doesn't allow the same delta chain depth and so generates a new object in the pack, rather the reusing a good delta it already has in the well-packed pack.

Cheers,

Harvey

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