Splitting windows

[csleech]

I know this is an old thread (10 years). Has window splitting ever been implemented? I would like to take two tabs and place them side by side to work. I have not found a way to do this... Essentially, what I am looking for is similar to that in Visual Studio where you can take two code windows and pane them side by side. This is a large performance drain having to bounce from tab to tab.