title: Hyperthreading on/off in simple python script
body: <p>I read something about hyperthreading and found out how beneficial it is for performace. I know the idea is something like when 2 disjoint processes on core are going to execute, in hyperthreading it can be executed in the same time. I also know, that hyperthreading is using some magic with spliting core to 2 virtual ones. </p>
  
  <p>But imagine this situation. I have some basic python script doing some maths. Its 1 threaded process and can push core to 100% for a long time. Its always doing the same, so it cannot use hyperthreading best feature to execute in same time.
  What will be the difference in performance in HT on and off?
  In ht on, will i have only 50-60% of the proccess performance or close to 100%?</p>
  
  <p>My example: I have 2 cores(4 threads), and im running 1 program on 100%, windows manager is showing around 32-33% cpu used by that process. I also try it with Process Explorer, there i see its capped with 25% on that process.So, if i dont have HT on, it will be 50%. But im now not sure, if im using only half of the core power, or its showing wrong numbers or whats over. I need some explanation.</p>