Python 使用 pyqtgraph 绘制大量文本标记 速度问题

我尝试在里面添加大量的 箭头， 大概总数据为 4w+ 其中 up 的有 4000+ down 的有 3000+， 然后渲染起来就非常慢 。。。。

 def set_history_arrow(self): print(f"===> up: {len(self.up)} down: {len(self.down)}") for up in self.up: print("up", self.up.index(up)) up_arrow = pg.TextItem('↑', fill=(255, 0, 0)) self.plot_widget.addItem(up_arrow) up_arrow.setPos(up, self.data[up]) for down in self.down: print("down", self.down.index(down)) down_arrow = pg.TextItem("↓", fill=(0, 238, 118)) self.plot_widget.addItem(down_arrow) down_arrow.setPos(down, self.data[down]) print("图形生成完毕") 

https://stackoverflow.com/questions/66690425/how-to-improve-the-speed-of-drawing-a-lot-of-textitem-in-pyqtgraph

大佬们有啥办法解决吗