Rust Programming Cookbook

How it works...

rayon-rs (https://github.com/rayon-rs/rayon) is a popular data-parallelism crate that only requires a few modifications to introduce automatic concurrency into the code. In our example, we are using the rayon::join operation to create a parallel version of the popular merge sort algorithm.

In step 1, we are adding dependencies for benchmarks ([dev-dependencies]) and to actually build the library ([dependencies]). But in step 2 and step 3, we are implementing a regular merge sort variation. Once we add the rayon dependency in step 4, we can add rayon::join in step 5 to run each branch (to sorting of the left and right parts) in its own closure (|/*no params*/| {/* do work */}, or |/*no params*/| /*do work*/ for short) in parallel ...