Python trades runtime speed for programmer convenience, and most of the time it’s a good tradeoff. One doesn’t typically need the raw speed of C for most workaday applications. And when you need to ...

supports move_to_end in O(1). On get, move the key to the end (most recent). On put, add/update the key at the end. If over capacity, pop the first item (least recently used). This achieves O(1) for ...

Persistent LRU cache with atomic writes, portable file locking, zero dependencies. Drop-in replacement for functools.lru_cache that survives restarts.