title: Different rendering speed Qt widgets
body: <p>I'm building an app (in Qt) that includes a few graphs in it which are dynamic (meaning refreshes to new values rapidly), and gets there values from a background thread. </p>
  
  <p>I want the first graph, whose details are important refreshing at one speed (100 Hz) and 4 other graphs refreshing in lower speed (10Hz).</p>
  
  <p>The problem is, that when I'm refreshing them all at the same rate (100 Hz) the app can't handle it and the computer stucks, but when the refresh rate is different the first signal gets artifacts on it (comparing to for example running them all an 10Hz).</p>
  
  <p>The artifacts are in the form of waves (instead of straight line for example I get a "snake").</p>
  
  <p>Any suggestions regarding why it has artifacts (rendering limits I guess) and what can be done about it?</p>