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Message: [QUOTE="Frank, post: 604135"] Above normal priority might be appropriate for IO or very critical and extremely short-lived tasks. It doesn't make your computer any faster, you'll just be stealing cpu time from other, perhaps more important, tasks. Hmm.. Probably ok if all the threads really are already started and you don't need to do anything else from your main thread till all the workers are finished. I assume joining on a finished thread will just return immidiately. Really? Try it the other way around... No reason to call sleep for a thread doing blocking IO. If it's non-blocking OTOH, you want to suspend it for a while when there's no input ready, or it will just burn cycles checking for input over and over. And do go over your synchronization approach, checking for deadlocks. [/QUOTE]