Performance issue in large list in Chrome browser


Steps to reproduce

Just browse (it is the demo document) (the clone i made in my folder)
in Chrome

Expected result

Smooth scrolling and no lagging

Actual result

CPU usage is high and scrolling is lagging.
When I use the Dev Tool to do performance profiling, it shows that some tasks are running even though the window is just idling.


desktop version/ Google Chrome 76.0 / Windows 10

Additional information

This issue is not found in Firefox.