Re: git fetch slow as molasses due to tag downloading

From: Junio C Hamano <junkio@cox.net>
Date: Dec 15, 2006, 21:55 UTC
Message-ID: <7vtzzwn7su.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <Pine.LNX.4.63.0612141701440.3635@wbgn013.biozentrum.uni-wuerzburg.de>

Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

> IMHO this should be solved as a filter: "git-show-ref --stdin 
> --show-invalid". Thus, git does not have to traverse _every_ ref for 
> _every_ incoming tag.

That sounds like a too specialized hack to me. We should first speed up the general "--verify $ref" case; as you corrected me earlier it still has a useless loop.

If it is still too slow (which I suspect it could be the case, with fork+exec overhead), we should _also_ pursue the filter approach, but even then I think "filter out the valid ones" is a specialized hack, if you mean "show only the invalid one's names" by --show-invalid.

It would make sense to do

        $ git show-ref --show-invalid v1.0.0 v2.6.18
        f665776185ad074b236c00751d666da7d1977dbe refs/tags/v1.0.0
        - refs/tags/v2.6.18

(and its equivalent to take refs from --stdin) though.