I have long assumed but never verified that not using -W to disable the
rsync incremental algorithm on a local copy, especially on NFS-mounted
files, would be much slower than using -W. I just did a measurement on a
copy between two nfs-mounted ~5MB files with and without -W and found it
took over 3 times longer without the -W.
Can anybody think of a scenario on a local copy where not doing -W would be
desired (other than debugging)? If not, maybe it should be the default if
both the source and destination are on the local host. Perhaps at least
for debugging their should be an option to do the opposite behavior.
- Dave Dykstra
