Computing PI

hello, just got my micro-8 a fews days ago

to train I started with some easy stuff, a hangman (text version fine I will post in another topic when I have some graphics)
and a pi bench, posted here, based on spigot algorthm which is currently used by electron greg to benchmark various 8 bits basics
oldbytes.space/@electron_greg/116409619073557779
I am actually discovering that algorithm which is interesting (idea of variable base change, pi is initially "222222222...")
www.pi314.net/eng/goutte.php

20 decimals computed in 0.345s 
of course no comparison possible with interpreted basic given compilation here
as arrays are fixed I could not parametrise the code
(note maybe preprocessor could help without needing to alter compiler ?)

attached zip with code and screenshots

have fun
christophe