Lightning Memory-Mapped Database Manager (LMDB) 1.0

LMDB 1.0 is a high-performance, memory-mapped Btree-based database library that offers full ACID transactions, concurrent read/write access, and corruption resistance through copy-on-write strategies, without requiring maintenance operations like checkpointing or log compaction. The library is extremely efficient because it eliminates malloc and memcpy operations during data fetches and uses a multi-versioned structure that allows readers to operate without locks while preventing writer deadlocks. The documentation includes important caveats about managing stale reader transactions and lock file issues to prevent database corruption and performance degradation.