Poor performance when handling long lines

[chibicitiberiu]

I tried the program, and one of the first issues I found was that when there are many long lines, the program becomes very sluggish and slow.

After copying and pasting the same text for a while, a part of the text suddenly disappears. It seems like a rendering issue.

[0x7c13]

I am using UWP system control (RichEditBox) as my Editor base and it comes with limitations. One of the limitations is what you just described and the reason here is actually because the limitation on the ScrollViewer. There is a rendering size limit on what it can render. Also, please take a look at my reponse for similar issue: #10

[0x7c13]

Please also take a look at these:
CommunityToolkit/WindowsCommunityToolkit#2858
microsoft/microsoft-ui-xaml#108

[0x7c13]

microsoft/microsoft-ui-xaml#1842