Let a thread use only unused computing power
<p>I searched for this and only found "unused imports" "increase of performance" "cloud computing" etc. questions...</p>

<p>So my question is: 
How do I make a thread in java only use cpu power that's not needed for another program? 
I can set the thread to lowest priority, but I still measure relatively high performance drops for other programs running on the computer.</p>
