The most noticeable performance improvement that I've seen so far is that the notifications bar is quicker to appear/disappear and causes less UI lag while doing so. For example, if you multitask away from the music player card to messaging, scrolling through your list of contacts would slow to a crawl while the notification bar popped in and populated itself with the music player icon. Now the notification bar shows up before I can even get to the messaging card. Then again, this could just be standard behavior after a fresh reboot and I could be suffering from the post-update placebo effect![]()