Thanks for this crate

[ajosecueto]

I have been testing and benchmarking it. Compared with rusoto presigned urls take to 150 times more to complete around 150 presigned urls.

Async vs Sync

but using multithreading aproach with tokio::spawn and join_all the diference is reduced to 10 times slower.

    let mut handles = Vec::new();

    for i in 1..10 {
        let mut private_key = fs::read_to_string("files/pk2.pem").unwrap();
        handles.push(tokio::spawn(async {
            let mut options = SignedOptions {
                key_pair_id: String::from("KEYPARD"),
                private_key: private_key,
                ..Default::default()
            };
            get_signed_url("https://domainHere/asdasd-2020-01-30-59245video/mp4", &options)
        }));
    }

    futures::future::join_all(handles).await;