Wait for GPU calculation to complete
wait(gpudev)
wait(gpudev) blocks execution in
MATLAB® until the GPU device identified by the GPUDevice object
gpudev completes its calculations. This can be used before
calls to toc when timing GPU code that does
not gather results back to the workspace. When gathering results from a GPU,
MATLAB automatically waits until all GPU calculations are complete, so you do
not need to explicitly call wait in that situation.