LMDB is a strong counter-example to your argument. Based on its benchmarks, you're wrong. [1] Yes immutable in-memory data structures are slower than their mut

LMDB is a strong counter-example to your argument. Based on its benchmarks, you're wrong. [1] Yes immutable in-memory data structures are slower than their mutable counterpoints, but we're not talking about either of those here. Databases are not in-memory data structures. [1] http://www.lmdb.tech/bench/microbench/july/ http://www.lmdb.tech/bench/microbench/july/