Re: Migrating away from SHA-1?

From: Junio C Hamano <gitster@pobox.com>
Date: Apr 15, 2016, 02:18 UTC
Message-ID: <xmqq37qnehrm.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <20160415021327.GC22112@sigill.intra.peff.net>

Jeff King <peff@peff.net> writes:

> [2] Somewhere in the list archive is my patch to find partial
>     collisions like "git commit --sha1=31337", and I did in fact use
>     that micro-optimization. That, along with multi-threading, made it
>     feasible to do 6-8 character prefixes, as I recall.

In our testsuite, we have a test that uses many objects, all of which have object names that begin with 10 '0' characters.