konva/tests/js/performanceTests.js

var startTime;

function start() {
  startTime = new Date().getTime();
}

function stop(build, test) {
    var t = new Date().getTime();
    var diff = t - startTime;
    console.log('[' + build.version + '] ' + test + ': ' + diff);
}

var tests = {
  'render 20,000 circles': function(Kinetic, container, test) {
    start();
    var stage = new Kinetic.Stage({
      width: 500,
      height: 200,
      container: container
    });

    var layer = new Kinetic.Layer();

    for (var n=0; n<20000; n++) {
      var circle = new Kinetic.Circle({
        x: Math.random() * 500,
        y: Math.random() * 200,
        radius: 40,
        fill: 'red',
        stroke: 'black',
        strokeWidth: 3
      });

      layer.add(circle);
    } 

    stage.add(layer);
    stop(Kinetic, test);
  }
};

var body = document.getElementsByTagName('body')[0]; 
function run(Kinetic) {
    body.innerHTML = '';
    for (var k in tests) {
        var div = document.createElement('div');
        body.appendChild(div);
        tests[k](Kinetic, div, k);
    }
    Kinetic = null;
}