Rustup 1.29.0 beta: Call for Testing!

// This program demonstrates that Rust 1.98.1 (edition 2024) can spawn
// multiple threads that run concurrently.  It does not actually download
// anything, but it shows the idea behind rustup's concurrent download
// feature by printing messages from several threads at the same time.
use std::thread;
use std::time::Duration;

fn main() {
    // Spawn three threads that simulate downloading different components.
    let handles: Vec<_> = (1..=3)
        .map(|i| {
            thread::spawn(move || {
                // Simulate a download taking a random amount of time.
                let sleep_time = Duration::from_millis(500 * i);
                thread::sleep(sleep_time);
                println!("Component {} downloaded in {:?} ms", i, sleep_time.as_millis());
            })
        })
        .collect();

    // Wait for all threads to finish.
    for h in handles {
        h.join().unwrap();
    }

    println!("All components downloaded concurrently.");
}