You might want to look at the green line too. (1h avg: 2312 Mkeys/s)

Although - yes - you provide 90% of the pool speed. With CPUs. It's insane. It's like almost 4000 CPU (modern) cores.
Or the equivalent of 100 of my notebooks (with GPU).

If I didn't know better I'd suspect you are testing some ASIC prototype. 


Rico