QtWebEngine performance is very poor

[jayce]

Open index.html in the browser and drag the workspace. It is normal and the effect is smooth. FPS is above 50.

Similarly, when I execute blocklyWeb.py and enable remote debugging of the web page (--webEngineArgs --remote-debugging-port=1234), the performance of the web page running in the pyside6 application is very poor, the FPS is very low, and the CPU The occupancy rate is as high as 100%.

why is that?

code is in here
https://github.com/Jayce-liang/blocklyTest

Demonstration video of browser and qt side