I’ve found that Microsoft’s mimalloc (available for Rust via https://crates.io/crates/mimalloc https://crates.io/crates/mimalloc) typically provides even better

I’ve found that Microsoft’s mimalloc (available for Rust via https://crates.io/crates/mimalloc https://crates.io/crates/mimalloc) typically provides even better performance than jemalloc. Of course, allocator performance can vary a lot depending on workload, which is why it’s good to have options.