Qt WebEngine 拖动卡顿的问题

代码来自于qt的simple browser，使用过程中发现拖动网页滑动条，明显的出现网页并没有马上滑动，存在一定的延迟，导致用户存在网页卡顿的感觉。

Google Translate: The code comes from the simple browser of qt. During the process of using it, it is found that dragging the webpage slider bar obviously shows that the webpage does not slide immediately, and there is a certain delay, which causes the user to feel the webpage.