Faster, ligher JS library: üjs (opens in new tab)

This type of jokes that just scream "April 1st! April 1st!" are not my favourite...

Not fast or light enough for me, i only use vapor.js

http://vaporjs.com/

It's not even an april fools joke....

I'm considering using it for my bootstrapped startup. Anybody know how it compares to ExtJS?