message: comment log print.
diff: @@ -216,7 +216,7 @@ define(function (require) {
  * Repaint the canvas immediately
  */
  refreshImmediately: function () {
  - var start = new Date();
  + // var start = new Date();
  // Clear needsRefresh ahead to avoid something wrong happens in refresh
  // Or it will cause zrender refreshes again and again.
  this._needsRefresh = false;
  @@ -225,12 +225,12 @@ define(function (require) {
  * Avoid trigger zr.refresh in Element#beforeUpdate hook
  */
  this._needsRefresh = false;
  - var end = new Date();
  + // var end = new Date();
  - var log = document.getElementById('log');
  - if (log) {
  - log.innerHTML = log.innerHTML + '<br>' + (end - start);
  - }
  + // var log = document.getElementById('log');
  + // if (log) {
  + // log.innerHTML = log.innerHTML + '<br>' + (end - start);
  + // }
  },
  /**
  