Function main

benchmark/dgram/single-buffer.js:18–53

({ dur, len, n, type })

});

function main({ dur, len, n, type }) {
  const chunk = Buffer.allocUnsafe(len);
  let sent = 0;
  let received = 0;
  const socket = dgram.createSocket('udp4');

  function onsend() {
    if (sent++ % n === 0) {
      // The setImmediate() is necessary to have event loop progress on OSes
      // that only perform synchronous I/O on nonblocking UDP sockets.
      setImmediate(() => {
        for (let i = 0; i < n; i++) {
          socket.send(chunk, PORT, '127.0.0.1', onsend);
        }
      });
    }
  }

  socket.on('listening', () => {
    bench.start();
    onsend();

    setTimeout(() => {
      const bytes = (type === 'send' ? sent : received) * chunk.length;
      const gbits = (bytes * 8) / (1024 * 1024 * 1024);
      bench.end(gbits);
      process.exit(0);
    }, dur * 1000);
  });

  socket.on('message', () => {
    received++;
  });

  socket.bind(PORT);
}