ZFS - CPU overhead per volume

Is there any information available on ZFS as to how much cpu overhead is created with a small number of large volumes as opposed to larger number of small volumes in a RaidZ configuration? An example might be 5 x 20GB volumes as opposed to 10 x 10GB volumes. How much more CPU overhead would be incurred with the 10 x 10GB instance?

[339 byte] By [tdavis] at [2007-11-26 10:22:50]