Widget render slower

Rendering is particularly slow when there is a large amount of data in the widget.
for example,A table with hundreds of data

@hyy thank you for the discussion, I do not believe the question is related to the framework itself, you may want to look up strategies on how to optimize your widget (presumably a react one), such as to lazy load data, or only render content which is visible (do not render content outside the viewport).

Thank you for your suggestion.
The reason for my problem is reading 3 files before render.
It takes 3s.