sS hSilentComputator() {

  ret hSilentComputator(hSilentComputator_defaultURI());

}

sS hSilentComputator(S wsUri) {

  ret hSilentComputator(wsUri, "");

}

sS hSilentComputator(S wsUri, S flag) {

  if (nempty(flag)) wsUri = addSlash(wsUri) + flag;

  ret div("Calculating", id := 'calcing)

  + hcss([[#calcing {

position: fixed;

width: 100%;

height: 100vh;

z-index: 9999;

visibility: hidden;

}]])

    + hMakeComputerID()

    + hreconnectingWebSockets()

    + hjavascript([[

      function sendPing() {

        ${PINGCMD}

      }

      var working = false;

      var benchResultl;

      var ws = new ReconnectingWebSocket("${URI}");

      ws.onopen = function(event) {

        console.log("WebSocket opened.");

      };

      ws.onmessage = function(event) {

        var d = event.data;

        while (d.length > 0 && d.charCodeAt(d.length-1) == 0)

          d = d.substring(0, d.length-1);

        console.log("Evaluating: " + d);

        var geval = eval; // use global scope

        geval(d);

        console.log("Evaluated.");

      };

      //working = true; // XXX

      //console.log("Eval test: " + eval('working'));

  ]].replace("${URI}", wsUri)

    .replace("${PINGCMD}", nodes_pingCmd()));

}