git-svn taking a long time

I compiled the perl bindings from subversion 1.6.x, and git git version 1.7.0.rc0.52.g64ba.

I have imported a largish svn repo using "git svn fetch", which takes quite a long time (at least a day).

But my problems is that if I rerun "git svn fetch" again right after fetching, it will chew for hours before figuring out there are just a few new revisions to import. And the same if I try again.

I have another import from the same repo (on another machine, using slightly different versions of stuff) that doesn't have this problem.

So, does anyone have any suggestions for what could be done about this?

This is what the entry i .git/config looks like (url edited to protect the innocent)

[svn-remote "svn"]
        url = svn://svn.server
        branches = foo/branches/*:refs/remotes/svn/*
        tags = foo/tags/*:refs/remotes/svn/tags/*