Comment 1 for bug 192464

Speed measurements were obtained like this:

Mount Samba share
sudo mount.cifs //host/share /home/user/mnt -o credentials=credfile,domain=mydomain,rw,directio

Time a file copy
time cp -v src dst

Calculate transfer rate
filesize (Mbit) / transfer time (seconds)

Without the directio option in the mount command the transfers are slightly faster, but the transfer rate fluctuates a lot (it seems to oscillate).