title: Why Simulink 2012b is slow compared to old versions (< 2010bSP2)
body: <p>I have migrated from Simulink 2010bSP2 to 2012b and I noticed a very poor performance slowdown. What I mean is: working with the model, zooming in, copying, paste, adding new blocks, compiling, running is slower.</p>
  
  <p>The same model, with same settigns run faster in 2010bSP2</p>
  
  <p>What happened ? Do the new versions of Matlab (2014 ->) have fixed this problem?</p>