[crazypython]

Did you use `__slots__` to store data pointers on the object itself, instead of in Python's hash table (today, a Hash Array Mapped Trie)?

[rciorba]

Don't remember the details of the legacy app, but I don't recall seeing that. I think it just used dicts for the data and stored that in a blist.sortedlist https://pypi.org/project/blist/

blist was the one C dependency which I replaced with a pure python alternative http://www.grantjenks.com/docs/sortedcontainers/