title: Graphics.drawImage() in Java is EXTREMELY slow on some computers yet much faster on others
body: <p>I'm having a strange problem, basically in Java Graphics.drawImage() is extremely slow on some computers and faster on others. This isn't related to the computers power either, some weaker computers run it fine while some stronger ones seem to choke up at the drawImage call.</p>
  
  <p>It may or may not be related to the width and height, I have a very, very large width and height defined (something like 5000 by 2500). I wouldn't think it's the issue except like I said it runs in real time speed on some computers and slower on others and doesn't seem to be tied to the computers relative power.</p>
  
  <p>Both computers have the same version of Java, both use Vista. One has a 1.83ghz Core 2 Duo with 1gb RAM and onboard graphics (runs everything fine), the other has a 2.53 ghz core 2 duo with a 9600GS (latest nVidia drivers) and 4gb of RAM and it literally chugs on the drawImage call.</p>
  
  <p>Any ideas?</p>
  
  <p>edit: ok this is really wierd, I'm drawing the image to a window in Swing, now when I resize the window and make it really small the image gets scaled down too and it becomes small. Suddenly everything runs smoothly, when I scale it back up to the size it was before it's still running smoothly!</p>
  
  <p>It also has multiple monitor issues, if I do the resize trick to make it run faster on one monitor then scroll it over to another monitor when more than half of the window is in the new monitor it starts chugging again. I have to resize the window again to small then back to its original size to get back the speed.</p>
  
  <p>If I do the resize trick on one monitor, move it over to the other it of course chugs, but if I return it back to the original monitor on which I did the resize trick it works 100%</p>
  
  <p>If I have two swing windows open (displaying the same image) they both run slow, but if I do the resize trick on one window they both start running smoothly (however this isn't always the case).</p>
  
  <p>*when I say resize the window I mean make it as small as possible to the point the image can't actually be seen.</p>
  
  <p>Could this be a bug in Java maybe?</p>