Method tickDelta

src/service/performance-impl.js:853–855

* Tick a very specific value for the label. Use this method if you * measure the time it took to do something yourself. * @param {TickLabel_Enum} label The variable name as it will be reported. * @param {number} value The value in milliseconds that should be ticked.

(label, value)

   * @param {number} value The value in milliseconds that should be ticked.
   */
  tickDelta(label, value) {
    this.tick(label, value);
  }

  /**
   * Tick time delta since the document has become visible.