A local shared clone is now much slower

Hi guys,

So commit 0433ad128c59 ("clone: run check_everything_connected") (which turned up with v1.8.3) added a large traversal to clone which (as the comment said) makes a clone much slower. It is especially noticeable on "git clone -s -l -n" which I use every day and used to be almost instant. Is there any thought to making it fast again, please?

The above clone is very useful for working with different branches in one tree without touching every file in the main branch you are working with (and consequent issues with rebuilding at least). As linux-next maintainer, you can imagine that I do this a bit.

I am sure one of Linus' points about branches was that being able to make a fast local clone of a tree to use more than one branch was a feature.