var start = new Date();
var startsec = start.getTime();
// run a loop counting up to 250,000
var num = 0;
for( var i = 0; i < 250000; i++ )
{
  num++;
}
var stop  = new Date();
var stopsec = stop.getTime();
var loadtime = ( stopsec - startsec ) / 1000;