lmdb::DUP_FIXED

pub const DUP_FIXED: DatabaseFlags = DatabaseFlags{bits: MDB_DUPFIXED,}

This flag may only be used in combination with DUP_SORT. This option tells the library that the data items for this database are all the same size, which allows further optimizations in storage and retrieval. When all data items are the same size, the GET_MULTIPLE and NEXT_MULTIPLE cursor operations may be used to retrieve multiple items at once.