Can someone suggest an editor for macOS with smart text algorithms to allow work on unlimited file size or line length? I need to view unlimited text, switch between encodings (including hex) and I want editor with proper algorithms, so it'll work instantly and without loading entire file in the memory. Should support search with fast regex engine.

Editing would be nice too. I imagine editing as a sequence of actions that editor remembers and can undo/redo (including search/replace) and saving is actually applying that sequence of actions to the original file in some smart way.

Also I want it to start instantly, so I can use it as my general text file editor.

Colours, autocompletions and other nonsense is strictly not needed. Just black text on white background.

All those editors just die when I'm trying to edit a simple file of several hundreds GBs with lines of several GBs.