Re: [WISH] Store also tag dereferences in packed-refs

From: Junio C Hamano <junkio@cox.net>
Date: Nov 19, 2006, 01:45 UTC
Message-ID: <7vac2o9pln.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <7vfycg9pu5.fsf@assigned-by-dhcp.cox.net>

Junio C Hamano <junkio@cox.net> writes:

Show 12 quoted lines

> Linus Torvalds <torvalds@osdl.org> writes:
>
>> On Sun, 19 Nov 2006, Marco Costalba wrote:
>>> 
>>> Tested also with show-ref only, not useful to me, but just as a comparison.
>>> 
>>> - git tree 1420ms
>>> - linux tree 1021ms
>>> 
>>> Better, but still slower then what I would expected.
>>
>> MUCH slower than expected.

There is something seriously wrong about Marco's number with or without my patch. I am getting something like this from linux-2.6 with fully packed and pruned refs;

$ /usr/bin/time git-show-ref -d >/dev/null 0.08user 0.00system 0:00.08elapsed 97%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+3314minor)pagefaults 0swaps

$ /usr/bin/time ../git.junio/git-show-ref -d >/dev/null 0.05user 0.01system 0:00.06elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2724minor)pagefaults 0swaps

The second one is with the patch, the first one is from yesterday's master.