flexchart 通过定时器刷新数据时，跑几分钟后刷新越来越慢是什么原因？

Richard.Ma

         flexChart1.BeginUpdate();
         var pointsList = new List<DataItem>();

                  foreach (var data in TraceOne)
                  {
                     pointsList.Add(new DataItem()
                     {
                        MLOG = data.MLOG,
                        FREQ = data.Freq.ToString(),
                     });
                  }

         AnnotationLayer  annotationLayer = new AnnotationLayer(flexChart1);

                        annotationLayer.Annotations.Add(new C1.Win.Chart.Annotation.Image(YCATE.Properties.Resources.Mark3)
                        {
                              SeriesIndex = 0,
                              PointIndex = index,
                              Attachment = AnnotationAttachment.DataIndex,
                              TooltipText = "Mark" + (i + 1).ToString()
                        });

         //flexChart1.DataSource = pointsList.ToArray();
         flexChart1.EndUpdate();