I love Vue and have used it before, but I would like to use an even smaller library if possible. I believe Inferno is 9kb and Preact is 3kb, so Vue isn't that far off, but I still would like to hear people's opinions on the truly tiny frameworks.

Preact's size for the amount of functionality and performance you get is unbeatable, I'd say.

If you do find something smaller, the amount of glue or performance related code you add will probably end up being more than Preact.