p-hk

I can't vouch for them, but there are Clojure[1] and C[2] implementations you might consider.

[1] https://github.com/clojure/core.rrb-vector

[2] https://github.com/hyPiRion/c-rrb

Thanks! I used draw.io and tweaked a number of the display properties to make it look more like Excalidraw.