easy or cheap to get a measurement that isn't skewed by kernel caching behavior. (You need a test file significantly larger than RAM, and even then you'd better repeat the measurement quite a few times to see how much noise there is in it.)
I found a really fast way in Linux to flush the kernel cache and that is to unmount the drive and then remount. Beats having to read though a file > RAM everytime.
---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
