On Thu, 22 Jan 2009, Warren Young wrote:
rsync doesn't use timestamps. It looks at the entire file contents for both source and target, and performs some pretty hefty computation on them. Thus, it only gives a speedup when copying files over a slow link between two machines. It's great over the Internet, not so great over a fast LAN, and useless within a single machine.
I have used rsync extensively for years, and sometimes in rather exotic ways. It does have a mode where timestamps are used.
I find your conclusions to be baseless. Usually when rsync is blamed to be slow, it is because it is used over SSH, which is slow.
Bob ====================================== Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/