I have 2 different parfor's in my script. With different number of iterations but no dependencies.
Is there a simple way that does not require re-writing to make MATLAB run both of them in parallel (with each other)?
As Matt alluded to, the easiest way to do this is involves some rewriting. parfor loops inherently take over the whole parallel pool so (as far as I know) you can't do what you're asking.
My preferred way of handling this would be to move the body of each loop into a function and then use parfeval.