async-nats 0.47.0

// Copyright 2020-2022 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use async_nats::{connect, Error, Subject};
use bytes::Bytes;
use std::time::Instant;

#[tokio::main]
async fn main() -> Result<(), Error> {
    let client = connect("nats://localhost:4222").await?;

    let now = Instant::now();
    let subject = Subject::from("foo");
    let dat = Bytes::from("bar");
    for _ in 0..10_000_000 {
        client.publish(subject.clone(), dat.clone()).await?;
    }
    client.flush().await?;

    println!("published in {:?}", now.elapsed());

    Ok(())
}