Performance issues

[Uni2K]

I tried to use this library to display some basic data from a database.
There were around 8 columns and a maximum of around 100 rows.

The problem is that its not possible to use the "table" with more than around 5 rows. Whenever scrolling is necessary, everything just becomes extremely laggy. It uses such high amounts of CPU that some devices/browsers even show a performance impact message. Scrolling is not even possible when the number of rows is >50, it then runs with <1FPS.

I looked at the code and found 2 mayor problems:

1. The rows are wrapped in a "Column" widget. This is super inefficient. I replaced it with a Listview.builder and got a huge performance increase.
2. The textinputfields in every cell are somehow pretty hard to render. Replacing them with standard text widgets leads to a massive gain in performance. However, the edit functionality is lost, which is why I transformed the "save" button into a "popupmenubutton" and introduced the options edit/delete.

Combining both points, everything works smooth like it should. Since point 2 is somewhat a conceptional change, I would at least recommend point 1.

[timmaffett]

You should consider forking the repository and making your changes available for others