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

tokio::time::sleep — async sleep. std::thread::sleep — blocking sleep.

tokio::time::sleep:

• Async.
• Non-blocking.
• For async code.

std::thread::sleep:

• Blocking.
• Blocks thread.
• For sync code.

1// Async sleep
2tokio::time::sleep(Duration::from_secs(1)).await;
3
4// Blocking sleep
5std::thread::sleep(Duration::from_secs(1));

Key: tokio for async, std for blocking.