@hundreds-father-404: nice work on https://gist.github.com/Eric-Arellano/defca7d864a9f3939448964beea618d4 . i expect that

sys.getsizeof

is lying to you a bit, because it isn't recursive (see https://docs.python.org/3/library/sys.html#sys.getsizeof), but that measuring recursively is challenging here (because things like TransitiveHydratedTarget intentionally structure share, and would lie to a naive recursive size calculation).

objgraph

might help there.