Comment by codys

Please don't use posix message queues (`mq_*`, `mq_overview`, etc) when you're writing a program with a single address space (like something that uses threads in a single process).

Posix message queues (the `mq_*` functions) are much slower than optimized shared memory queues using typical atomics and have semantics that are unexpected to most (they persist like files after process termination, because of what they are designed to be used for, they have system level limits on size and size of items, etc).

A simple benchmark vs rust's `std::sync::mpsc` queue shows `std::sync::mpsc` is 28.6 times faster when using 1 producer and 1 consumer, and is 37.32 times faster with 2 producers and 1 consumer.