Are you talking about CPU usage while doing a particular operation, or just in general? There are definitely ways to reduce CPU usage for specific operations. For example, while performing buffered analog input: periodically check the points available with the read property node and don't call DAQmx Read until the number of points you want to read are available. Make sure you call the LabVIEW "Wait" primitive between calls to the property node, or you won't gain anything in terms of CPU efficiency.
If you're talking about other operations, I can probably help with them, too.
Joe
