gistfile1.d

import std.datetime : AutoStart, Duration, StopWatch;
import std.socket;
import std.stdio;

void main() {
  foreach (factory; [
    cast(Socket delegate()){ return new TcpSocket(new InternetAddress("google.com", 80)); }, // Cast due to a DMD @@BUG@@.
    { auto pair = socketPair(); return pair[0]; } // Temporary due to a DMD @@BUG@@.
  ]) {
    foreach (msecs; [1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000]) {
      auto sock = factory();
      sock.setOption(SocketOptionLevel.SOCKET,
        SocketOption.RCVTIMEO, dur!"msecs"(msecs));

      auto sw = StopWatch(AutoStart.yes);
      ubyte[1] buf;
      sock.receive(buf);
      sw.stop();

      Duration readBack = void;
      sock.getOption(SocketOptionLevel.SOCKET, SocketOption.RCVTIMEO, readBack);

      writefln("Set: %s ms (%s ms). Actual: %s ms.", msecs,
        readBack.total!"msecs", sw.peek().msecs);
    }
  }
}