Enter Bonsai Tries, a new storage format for Besu; the Quore's blockchain engine. The experimental “bonsai” flag, when set, starts a Besu node with a new “flat” storage structure. Instead of keeping large “trees” within storage, Bonsai keeps only the most recent trie in its storage as well as a trie log layer. This log layer provides a smaller store of changes that, when needed, can be used to construct the complete history of the tries, not just the most recent. This reduces storage and offers much faster times for nodes to read any data about Ethereum’s current state (O(1) account lookups). It also makes accessing the most recent data on the blockchain much faster, though lookups farther back take a little more time. To get into the weeds, the bonsai approach also provides implicit tree pruning, reduced disk usage by nodes, faster synchronization of nodes, and a reduction of the client “running blocks behind” the network.