Code shared from the Rust Playground

playground.rs

use tokio::time::{Duration, sleep};

#[tokio::main]
async fn main() {
    for _ in 0..1_000_000 {
        tokio::spawn(async {
            sleep(Duration::from_secs(1)).await;
        });
    }
    println!("Spawned 1M tasks!");
    sleep(Duration::from_secs(1)).await;
}