Async Spawn Tasks

Spawn concurrent tasks with tokio::spawn.

Difficulty

Advanced

Code

use tokio;

async fn process(id: u32) -> u32 {
    // simulate work
    tokio::time::sleep(std::time::Duration::from_millis(50)).await;
    id * 2
}

#[tokio::main]
async fn main() {
    let mut handles = vec![];
    for i in 0..5 {
        handles.push(tokio::spawn(process(i)));
    }

    let mut results = vec![];
    for handle in handles {
        results.push(handle.await.unwrap());
    }
    println!("results: {:?}", results);
}

Explanation

This example demonstrates how to use async spawn tasks in Rust. Read the code carefully to understand the flow. Pay attention to where values are created, borrowed, moved, or consumed.

Key Concepts

• Rust's strong type system catches errors at compile time
• Ownership and borrowing rules ensure memory safety
• Pattern matching makes code expressive and exhaustive

Related Topics

Browse more examples in the async category to build a complete understanding of this topic.