Does fmmax support GPU calculation currently?

[Simulator-CEM]

As stated, does fmmax support GPU calculation currently?

[mfschubert]

Yes, as stated in the README.md

[Simulator-CEM]

What about the performance compared with the CPU computation, if all the calculations are based on double-precision data? And what if the "magma" is further used?

Or do you recommend to use the GPU computation if I want to optimized an high-contrast dielectric crossed grating with N≈1000 based on auto-differentiation?

[mfschubert]

I have found GPU to be faster, and I expect this would be true in most cases. Regarding magma, on my hardware I have found the magma-backed eigendecomposition to be significantly slower than CPU-backed eigendecomposition.

For your use case, I would suggest GPU.