I have a Windows desktop PC at home and a MacBook for working everywhere else. I use LaTeX every single day, so it is important to me that "it just works".
Up to now I've been using TeXStudio because this editor is always mentioned as one of the top editors both on Windows and on MacOS. However, lately I've been having more encoding (latin1 vs. utf8 - I write in German so I need umlauts) issues out of nowhere and that can become rather cumbersome. Moreover, for very long files (thesis, books), it seems to me that TeXStudio is rather slow both on Windows and MacOS (while editing and compiling).
So I'm looking for an editor that is as lightweight and fast as possible and can also compile .tex files very quickly. Ideally, that editor is available on both Windows and MacOS and is "idiot-proof" regarding encoding.
For this, I thought about just using editors more popular with coders, like Vim, Sublime Text 2 or VS Code. I hardly need any of the features provided by the GUI of TeXStudio (actually seems unnecessarily bloated to me), so a simple editor would maybe be better for me. However, I don't want to run into issues while compiling or using e.g. bibLaTeX.
I also looked at TeXPad which looks gorgeous and very clean, but unfortunately is not available on Windows. So I'm again a bit hesitant because of possible encoding issues every now and then.
What would be the best pick for frequent switches of platforms and fast compiling?