Image blur example is unusably slow

[bryevdv]

I was experimenting with NumPy 2.0 so at first I thought it might be related to that, but the issue persists with NumPy 1.26 as well.

It's possible there is some problem with serialization e.g. missing the binary array fast path. But other "animated" examples seem to work just fine with both Numpy 1.26 and 2.0.0rc1 so I wonder if there might actually be a numba issue in some way.