Issue in GPU_Programming.ipynb

[tutelarix]

The issue is found in https://github.com/noahgift/cloud-data-analysis-at-scale/blob/master/GPU_Programming.ipynb.

The Mandelbrot calculation isn't done with CUDA in the last example of Mandelbrot. For sure, it's done with @jit, because create_fractal function is used. To launch CUDA you need to launch mandel_kernel function and of course, as you said copy data to CUDA before.

And the interesting question is why the second launch of the create_fractal function was faster. Because Numba has to compile function and this takes time. On the second time, the cached machine code will be launched much faster.