Datagrid is very slow when loading 500 records

[upswing1]

What is the fastest recommended method to load data in the datagrid? Currently I bind a collection of records but the rendering is very slow. Can the rendering be done only after all the data is loaded in the control?

[enisn]

It's discussed here: #190 (comment)

@YBTopaz8 investigated issue and it seems it's not realted to UraniumUI. Maui has some performance issues on windows. Do you have same problem on other platforms too?

[enisn]

Also you can try this workaround, it seems it's working better than current situation

[YBTopaz8]

I'm doing to side with you on this one!
It seems to be a MAUI issue on windows indeed.

I haven't had this problem on android AT ALL

[upswing1]

I have not tested on other platforms

Here is some data that will explain the problem:
loading first collection (first time)
00:00:08.0762845
loading a second collection (first time)
00:01:01.0588048
loading first collection (second time)
00:02:35.0036999

So the same collection loading time goes from 8 seconds to 2:35 minutes

I tried a different test
loading first collection (first time)
00:00:07.9608214
reloading immediately the first collection )
00:00:01.4920819

loading second collection (first time)
00:01:00.2177744
reloading immediately the second collection )
00:00:01.5378519

loading first collection (second time)
00:02:34.9020166
reloading immediately the first collection )
00:00:01.7811220

here is the test code for immediate reload

private Stopwatch sw = new Stopwatch();
private async void ViewDataButton_Clicked(object sender, EventArgs e)
{

    bool answer = await Shell.Current.DisplayAlert("Warning", "Depending on the size of your data set this can take a while. Do you want to proceed?", "Yes", "No");
    BrowseButton.IsEnabled = true; progressBar.IsVisible = false;
    try
    {
        if (answer)
        {
            await LoadData();
            Thread.Sleep(1000);
            await LoadData();
        }
    }
    catch(Exception exc)
    {
        string s = exc.Message;
    }
        
    return;
}
async Task LoadData()
{
    sw.Reset();
    sw.Start();

    Lbl_ViewData.IsVisible = true;
    ViewDataActivity.IsRunning = true;

    await Task.Run(() =>
    {
        Thread.Sleep(1000);
        MainThread.InvokeOnMainThreadAsync(() => DataGrid.ItemsSource = tempTasks);
    });

    sw.Stop();
    Debug.WriteLine(sw.Elapsed.ToString());
    progressBar.Progress = 0.8;

    ViewDataActivity.IsRunning = false;
    Lbl_ViewData.IsVisible = false;

}

What can cause this behaviour in my code?