Re: svn to git, N-squared?

for i in ??
do
	cp -r $i $i.new
	rm -rf $i
	mv $i.new $i
done

in your .git/objects/ directory (CAREFUL! Any script that does "rm -rf" 
should be double- and triple-checked for sanity! ;)

Insanity is copying the data rather than just the file name.  Git is
good about not reading unnecessary files, and anything necessary should
be cached, so on-disk fragmentation is not a concern.

rmdir --ignore-fail-on-non-empty ??	# Probably unnecessary.
for i in ??
do
	mkdir $i.new
	mv $i/* $i.new
	rmdir $i
	mv $i.new $i
done