Vertical scrolling of navbar & compared columns, is very jerky / laggy / jumpy.

[garry-ut99]

• vertical scrolling of navbar & columns is very jerky / laggy / jumpy in ComparePlus 1.1 or dev, which is very annoying
• it does occur even when comparing very small and simple files, which means it's not caused by too large / too complicated files / or too long lines
• the issue doesn't occur in Compare 2.0.2 (or is barely noticeable to the point it's not a problem)
• the issue occurs on Notepad++ 8.5.7 in both 32bit & 64bit versions, I use Win 7

I've recorded animations as a comparision :

ComparePlus 1.1 or dev - jerky, laggy

Compare 2.0.2- smooth

[pnedev]

That is a tradeoff for using another approach for diffs alignment which allows showing the real line numbers in the compared files and also allows keeping the undo history.
I'll see if I can make it a bit better but the scrolling for sure cannot be as smooth as that in Compare v2 (again for implementation reasons and Scintilla internals - the Notepad++ editing engine).

BR

[garry-ut99]

Ok, by the way, the same issue happens in UltraCompare, but some other compare tools like Beyond Compare, don't have this issue.