Rust: What is the difference between std::thread and tokio::spawn?

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

std::thread:

• OS thread.
• Blocking.
• Higher overhead.

tokio::spawn:

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

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

Key: tokio::spawn for async, std::thread for blocking.