> Multicore processors and concurrent programming<p>> To take full advantage of multicore processors, a programming language needs to provide mechanisms for concurrency…All of the languages in this chapter—Go, Rust, Kotlin, and Elixir—were specifically designed to address this need for concurrency.<p>This confuses concurrency and parallelism. All of these languages have support for I/O concurrency. But the CPU parallelism support varies significantly. Go is fairly bad at such parallelism, because it doesn't have generics for concurrent data structures, parallel iterators, etc. Rust has pretty good support for it, with Rayon and Crossbeam. Kotlin does too, since it inherits the Java ecosystem, including the excellent java.util.concurrent package. I'm not sure about Elixir; my understanding is that the Erlang VM is not really designed around shared memory, which limits the potential for CPU parallelism.