UI become slow and unresponsive when you have more than 100 rowsCount

[ArslanAsghar123]

https://github.com/rickypid/flutter_expandable_table/assets/56467320/c2707f43-509f-492a-a5fe-e220b27fc6b7

i set the data as follow static const int columnsCount = 29; static const int subColumnsCount = 2; static const int rowsCount = 100; static const int subRowsCount = 10; static const int totalColumns = columnsCount + subColumnsCount;

PTN: i used the same code in example

[coderof19clc7]

Is this solved? Currently I'm getting very laggy UI with the data static const int columnsCount = 6; static const int subColumnsCount = 0; static const int rowsCount = 100; static const int subRowsCount = 100; static const int totalColumns = columnsCount + subColumnsCount;

[coderof19clc7]

Hi @rickypid , after exploring the code of the package, I think the problem may come from the SingleChildScrollView and ListView as they will surely always render everything in the list all the time. So can you try to use ListView.builder or CustomScrollView instead and test with the large amount of item? Thanks

[rickypid]

Hi @coderof19clc7,

unfortunately I am in a very busy work period, it may be that the problem is related to SingleChildScrollView/ListView, I would have to do some tests to understand the impact of this change, I hope in the next few weeks to have a chance to look into the problem. Sorry

[ArslanAsghar123]

@coderof19clc7 I resolved this issue by creating a custom table, and you're right — the ListView was causing the problem. However, you can also achieve the desired result using a ListView.builder with each row as a child. Additionally, I added an API call for expanded rows, which provides a faster UI experience by loading data for a row only when it's developed. The drawback of ListView.builder is its default behaviour of collapsing expanded rows when the view scrolls off-screen, as it optimizes performance by recycling views.

[rickypid]

Hi @ArslanAsghar123,

Could you create a PR with the changes to solve this issue?

Thank you!!!

[ArslanAsghar123]

@rickypid I'll handle it as soon as possible, although I'm currently managing a busy schedule. (Note: I built a custom table with a mapper to manage row and column data, and I will transfer its logic to your repository)

[rickypid]

@ArslanAsghar123 As soon as you have time, I would like to solve this performance problem and if you have a suggestion, it is welcome!!!! 🚀

[rickypid]

Hi @ArslanAsghar123 and sorry for the reminder, have you had a chance to prepare a PR draft to propose your changes?