AsyncMemory

gistfile1.txt

    this.AsyncMemory = function () {
      var memory;
      var tid;

      var cleanNextTick = function () {
        clearInterval(tid);
        tid = setTimeout(function () {
          memory = undefined;
        });
      };

      return {
        evaluate: function (getValueFn) {
          if (memory === undefined) {
            memory = getValueFn();
            cleanNextTick();
          }
          return memory;
        }
      };
    };