title: OpenCL vs OpenMP performance
body: <p>Have there been any studies comparing OpenCL to OpenMP performance? Specifically I am interested in the overhead cost of launching threads with OpenCL, e.g., if one were to decompose the domain into a very large number of individual work items (each run by a thread doing a small job) versus heavier weight threads in OpenMP were the domain was decomposed into sub domains whose number equals the number of cores.</p>
  
  <p>It seems that the OpenCL programming model is more targeted towards massively parallel chips (GPUs, for instance), rather than CPUs that have fewer but more powerful cores.  </p>
  
  <p>Can OpenCL be an effective replacement for OpenMP?</p>