code: function () {
  		var parts = this._parts,
  		    tolerance = this.options.smoothFactor;
  
  		for (var i = 0, len = parts.length; i < len; i++) {
  			parts[i] = L.LineUtil.simplify(parts[i], tolerance);
  		}
  	}
docs: simplify each clipped part of the polyline for performance