Computers are just as fast as they can be. One way to speed up our programs is to do things in parallel, or concurrently. There is a fine distinction between those two terms. Parallel execution means that we execute two different tasks at the same time, on two different CPUs. Concurrent execution means that a single CPU makes progress on more than one task at the same time, by interleaving the execution of those tasks. The Rust standard library gives bindings and abstractions for the underlying ...