I've done 2.5 billion digits in 88 seconds with ycruncher. That's about 28.4 million digits a second?

http://ewams.net/?date=2020/04/17&view=sockets_vs_cores_for_...

Though that is with a broadwell CPU and about 3 years ago. Might see if I can get my hands on a 6348 ice lake CPU and see how she burns.