Ask HN: Zero Latency Text Editing

Yes, impossible, but how about absolutely minimal latency word processing? I'm highly sensitive to any lag at all. My go to notes manager, nvALT, works fine for smaller documents, but lags noticeably after just 2000 words or so. Other editors are noticeably laggy from the jump. It's not a hardware deficiency (I have a well spec'd 2021 MacBook Pro). I'm so frustrated by typing lag that I'd pay just about anything for a dedicated writing device or app if it could render my letters so fast I can't tell there's any gap at all. Suggestions?