Canvas2D frame rate drop in Safari after upgrading to iOS 18.5 on iPhone 13 Pro

Using the browser to access the design website I often use, which is based on canvas2D development, My previous mobile phone system was iOS17.4, which was very smooth to use, no matter how many pictures were loaded, it would not lag, but now I have upgraded to iOS 18.5, it has become very laggy and completely unresponsive, especially canvas2d after calling globalCompositeOperation, The frame rate will become very low and completely unusable. The web page I visited is the same web page, the only difference is the system version. My phone model is 13pro. After testing, I found that I used my old Android phone a few years ago, which was smoother than iOS18. It seriously affects my work.

[Re-Titled by Moderator]