A while back I made patch to graphically represent amplitude peaks in 500 x 64 pixel struct graph that takes about 1 second to load in Pd Vanilla but over 10 seconds in Purr Data.
As I was converting all my guitar effects to Purr Data to see if the custom knob performed better (which they do, heaps! )

I made this work around for the time being using draw path dynamically with lists, and it is in fact faster than vanilla version, but I prefer the raw look rather than the antialiased look

Other than that I am very pleased with the results from Purr Data thank you @jancsika

Cheers Balwyn

I will upload this if anyone is interested (zoomed out)