I also used this in a similar situation, it helped me to save a lot of memory in my skiplist implementation: https://github.com/sepeth/python-skiplist/commit/0

I also used this in a similar situation, it helped me to save a lot of memory in my skiplist implementation: https://github.com/sepeth/python-skiplist/commit/00ae7f942467b3e78c6cce5d08ccbad20b520023 https://github.com/sepeth/python-skiplist/commit/00ae7f94246... Redis's skiplist is also using the same feature: https://github.com/antirez/redis/blob/unstable/src/server.h#L611 https://github.com/antirez/redis/blob/unstable/src/server.h#...