code: function stop() {
    var time;
    if(!this.enabled) return false;
    time = this._record.isSlowerThan(this._slowerThan);
    if(this._record && time > -1) {
      this._records.unshift(this._record.toArray(id++, time));
      if(this._records.length >= this._maxLen) {
        this._records.pop();
      }
    }
  }
docs: Stop timing current command execution.