OS 10.15.7 and Compressor update slows down Compressor?

What if the CPU and GPU graphs were lower, but the job finished faster because it made better use of Quick Sync which isn't reflected on those graphs? Did the person who posted that even time the job, or was he so mesmerized by the graphs that was overlooked?

Also the title said "no hyperthreading". How would they know that? If it was a 10 core machine, the CPU graph shows 11 cores which implies hyperthreading was enabled.