From: Lea Wiemann <lewiemann@gmail.com>
Date: Thu, 19 Jun 2008 21:10:12 GMT
Subject: name-rev --stdin is slow
Message-ID: <485ACB34.2020901@gmail.com>

name-rev --stdin has some really high start-up time.  The example below 
is on my git.git branch.  Is this unavoidable to make name-rev fast for 
naming high numbers of revisions -- i.e. is it about amortization? 
Still, 0.7 seconds seems pretty excessive, and on linux-2.6 it even 
takes 6 seconds.

Anyone care to look into it?

$ time echo HEAD | git name-rev --stdin
HEAD

real	0m0.748s
user	0m0.588s
sys	0m0.080s
$ time git name-rev HEAD
HEAD master

real	0m0.041s
user	0m0.016s
sys	0m0.028s