4 times as efficient as on the SoC's low end arm cores, soo many times less efficient than on modern GPUs I guess? Not that I was expecting GPU like efficiency

4 times as efficient as on the SoC's low end arm cores, soo many times less efficient than on modern GPUs I guess? Not that I was expecting GPU like efficiency from a fairly small scale FPGA project. Nvidia engineers spent thousands of man-years making sure that stuff works well on GPUs.