Rust: What is the difference between TcpStream and tokio::net::TcpStream?

TcpStream — blocking. tokio::TcpStream — async.

TcpStream:

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

tokio::TcpStream:

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

1// Blocking
2use std::net::TcpStream;
3let stream = TcpStream::connect("127.0.0.1:8080")?;
4
5// Async
6use tokio::net::TcpStream;
7let stream = TcpStream::connect("127.0.0.1:8080").await?;

Key: std for blocking, tokio for async.