check if ip / port is up as fast as possible

Cargo.toml

[package]
name = "ip-up"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
port_check = "0.1.5"

fast-ip-check.rs

use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
use std::net::IpAddr;
use std::time::Duration;

fn main() {
    use std::time::Instant;
    let now = Instant::now();
    let five_seconds = Duration::new(5, 0);
    let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 2)), 10);
    match TcpStream::connect_timeout(&socket,five_seconds) {
        Ok(_) => println!("Good."),
        Err(_) => println!("Bad."),
    }
//    println!("{:?}",port_check::is_port_reachable("caret.rs:443"));

    let elapsed = now.elapsed();
    println!("Elapsed: {:.2?}", elapsed);

}