magjac · August 3, 2017 21:47
diff --git a/index.html b/index.html
 <!DOCTYPE html>
 <meta charset="utf-8">
 <body>
  <h1>Open the console and look for messages</h1>
  <script src="//d3js.org/d3.v4.min.js"></script>
  <script>


    var period = 1000;

    var i1 = d3.interval(f1, period);
    var i2 = d3.interval(f2, period);

    var n = 1;
    var m = 100000000;
    var t0 = t1 = t2 = Date.now();

    function f1(elapsed) {
        var now = Date.now()
        console.log('f1 now =', now, 'elapsed =', elapsed, 'real elapsed =', now - t0, 'elapsed error =', now - t0 - elapsed, 'interval error =', now - t1 - period);
        console.time('f1 ' + n);
        for (i = 0; i < n; i++)
            ;
        console.timeEnd('f1 ' + n);
        t1 = now;
    }

    function f2(elapsed) {
        var now = Date.now()
        console.log('f2 now =', now, 'elapsed =', elapsed, 'real elapsed =', now - t0, 'elapsed error =', now - t0 - elapsed, 'interval error =', now - t2 - period);
        console.time('f2 ' + n);
        for (i = 0; i < n; i++)
            ;
        console.timeEnd('f2 ' + n) ;
        t2 = now;
        n = m;
        m = m / 10;
        if (n < 1) {
            i1.stop();
            i2.stop();
        }
    }

 </script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<body>
	<h1>Open the console and look for messages</h1>
	<script src="//d3js.org/d3.v4.min.js"></script>
	<script>


	var period = 1000;

	var i1 = d3.interval(f1, period);
	var i2 = d3.interval(f2, period);

	var n = 1;
	var m = 100000000;
	var t0 = t1 = t2 = Date.now();

	function f1(elapsed) {
	var now = Date.now()
	console.log('f1 now =', now, 'elapsed =', elapsed, 'real elapsed =', now - t0, 'elapsed error =', now - t0 - elapsed, 'interval error =', now - t1 - period);
	console.time('f1 ' + n);
	for (i = 0; i < n; i++)
	;
	console.timeEnd('f1 ' + n);
	t1 = now;
	}

	function f2(elapsed) {
	var now = Date.now()
	console.log('f2 now =', now, 'elapsed =', elapsed, 'real elapsed =', now - t0, 'elapsed error =', now - t0 - elapsed, 'interval error =', now - t2 - period);
	console.time('f2 ' + n);
	for (i = 0; i < n; i++)
	;
	console.timeEnd('f2 ' + n) ;
	t2 = now;
	n = m;
	m = m / 10;
	if (n < 1) {
	i1.stop();
	i2.stop();
	}
	}

	</script>