Math worker vs Delphi, sizing a new system

[toad]

I'm investigating setting up a new Polis instance for a project, and I need to come up with some estimates.

What does the Math worker do nowadays that Delphi does not? Do we still need to assume a vast amount of memory for the math worker in addition to the Delphi workers? It seems like Delphi was initially a port of the old Clojure math in polismath/ ?

Also, can Delphi use a GPU? The docs are unclear on this - the code in the autoscaling docs does not appear to exist anywhere.

Thanks.