Rust: What is the difference between thread::spawn and task::spawn?

thread::spawn — OS thread. task::spawn — async task.

thread::spawn:

• OS thread.
• Blocking.
• Higher overhead.

task::spawn:

• Async task.
• Non-blocking.
• Lower overhead.

1// OS thread
2std::thread::spawn(|| {
3    println!("Blocking work");
4});
5
6// Async task
7tokio::spawn(async {
8    println!("Async work");
9});

Key: thread for blocking, task for async.