When message delivery speed> pop GetMessage processing speed will have been busy? At this time of CPU will not rise? Because the GetMessage only when there is no message in the message queue hangs, if you have any message in the queue have been, not very busy, cause the system reduce the chances of other threads to get the CPU time slice in?

Close test this kind of situation, will indeed make CPU usage increased sharply,

Search on the net post, never discussed this kind of situation, did not find the MSDN inside related situation,

Looking forward to Daniel,