Thanks for the feedback! I appreciate you pointing that out. My understanding was based on the PyTorch documentation for scaled_dot_product_attention (https://pytorch.org/docs/stable/generated/torch.nn.functiona...). - "The function may call optimized kernels for improved performance when using the CUDA backend. For all other backends, the PyTorch implementation will be used."

And was trying to make a broader point about the lack of transparency (in performance, lower-level impl) in PyTorch when running on NVIDIA vs. non-NVIDIA hardware.