Implement a Rust thread pool by adding the rayon crate and using par_iter() to parallelize collection processing.
Use the rayon crate to implement a thread pool by mapping a closure over a collection, which automatically distributes work across available CPU cores.
use rayon::prelude::*;
fn main() {
let v: Vec<i32> = (0..100).collect();
let sum: i32 = v.par_iter().sum();
println!("Sum: {}", sum);
}
Add rayon = "1.10" to your Cargo.toml dependencies.
A thread pool is a group of worker threads ready to handle tasks, preventing the overhead of creating a new thread for every single job. Think of it like a restaurant kitchen with a fixed number of chefs; instead of hiring a new chef for every order, existing chefs pick up new tickets as they finish cooking. You use this to speed up heavy calculations by running them simultaneously on all your computer's processors.