Function onsend

benchmark/dgram/offset-length.js:24–34

()

  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, 0, chunk.length, PORT, '127.0.0.1', onsend);
        }
      });
    }
  }

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