On Sun, 22 Nov 2009 23:35:24 -0800, Keith Packard <keithp@keithp.com> wrote:
> Tracking directory mtime instead of just looking at the read-only bit
> would let us skip directories that haven't seen any change in content.

We've had directory mtime for a long time. I added the check for the
read-only bit afterwards to be able to avoid stats on a whole directory
hierarchy, (since mtime doesn't propagate upward of course).

> Tracking directory contents would let us easily detect name changes
> (add/remove/rename).

Do we want git tree objects for the directories? ...

-Carl