"git svn fetch" slow

[Markus Heidelberg <markus.heidelberg@web.de>]

Hi,

since several days "git svn fetch" didn't seem to work any more. I
bisected it down to

    commit dbc6c74d0858d77e61e092a48d467e725211f8e9
    git-svn: handle empty files marked as symlinks in SVN
    2009-01-11

In the new function _mark_empty_symlinks() there is a loop that takes
about 36 seconds for me. That means each svn revision takes 36+x seconds
for downloading. So it still works, but I aborted it before waiting so
much time, so I thought, it didn't work any more.

The loop loops over each blob ("git ls-tree -r git-svn | wc -l" times).
The project I'm using git-svn with is Buildroot and it has currently
3074 blobs in the tree. Printing a loop counter every time the loop is
executed, I can see that it mostly goes really fast, but there are
files, where it needs much time then.

Could there be a way to avoid this time consuming step?

Markus