Comparing Plot parameters for threads, memory, and staggering

[cultiv]

@codinghorror

increasing from 2 threads to 4 threads improves plot time by about 15 percent!

Seems to check out with the post here: Optimizing Plotters

@codinghorror

I recommend you stagger at roughly the 55% point when P2 is complete,

Nice one! I had it stagger at around 30% but with little benefit. More threads + slightly later stagger it is.