Dummy object mimic slow hashing

slow_hash.py

from time import sleep


class SlowHashObject:
    def __init__(self, value):
        self.value = value

    def __hash__(self):
        sleep(0.1)
        return hash(self.value)

    def __eq__(self, other):
        if isinstance(other, SlowHashObject):
            return self.value == other.value
        return self.value == other