From: Konstantin Ryabitsev Date: Fri, 23 Mar 2018 13:57:18 GMT Subject: Re: The most efficient way to test if repositories share the same objects Message-ID: <179c3cf0-72bd-559a-1e00-b18ce97e8136@linuxfoundation.org> In-Reply-To: On 03/22/18 17:44, Junio C Hamano wrote: > Wouldn't it be more efficient to avoid doing so one-by-one? > That is, wouldn't > > rev-list --max-parents=0 --all > > be a bit faster than > > for-each-ref | > while read object type refname > do > rev-list --max-parents=0 $refname > done > > I wonder? Yeah, you're right -- I forgot that we can pass --all. The check takes 30 seconds, which is a lot better than 12 hours. :) It's a bit heavy still, but msm kernel repos are one of the heaviest outliers, so let me try to run with this. Thanks for the suggestion! Best, -- Konstantin Ryabitsev Director, IT Infrastructure Security The Linux Foundation