One thing that is hacky/a problem with the app is that I wanted to be able to hash tag notes and have the hashtags a different color. Also very soon i'd like to add the ability to highlight text. It's pretty hard to do that smoothly even with the contenteditable attribute.
I decided on a transparent textarea over a div and I sync and transform the content. It is a bit clunky as you say but I anticipate it will get better.
Intel Core2 Duo T9600, 4G Ram, Debian 64bit, Chromium 35, adblock plus as the only extension.
I just checked at chrome://gpu/ and I don't have WebGL or any other hardware acceleration feature for CSS etc. enabled. Perhaps the others experience some hardware acceleration gone wrong?
Run a JS profile on your code, I think there's some performance bugs.
It's a note-taking app. It should run fine on a 1980s calculator
i5 3570K, 16GB DDR3, FF36 and Chrome 41, Xubuntu 14.04 input speed seems to be equally slow on both, very noticeable if you press and hold a key.