There's a 1000ms delay between the tap action on unlock screen and the beginning of the unlock transition.

url to video capture. sequence: - tap: 52.6 - transition begins: 53.6

400ms of that is in repaintTimeout which we hit every time on Unagi - https://github.com/mozilla-b2g/gaia/blob/master/apps/system/js/lockscreen.js#L559 300ms in transition-delay for .unlocked - https://github.com/mozilla-b2g/gaia/blob/master/apps/system/style/lockscreen/lockscreen.css#L31

unlock tapped: 0 hit timout for repaint: 484 removing locked class: 493 transition start: 935 transition end: 1435

remove: - transition-delay - reduce timeout (we're hitting it after 100ms without noticable difference because the transition takes 500ms anyway) move some function post setting nextFramePaintListener

Comment on attachment 716886 [details] Pointer to Github pull request: https://github.com/mozilla-b2g/gaia/pull/8253 The delay might be in to work around a bug.

Comment on attachment 716886 [details] Pointer to Github pull request: https://github.com/mozilla-b2g/gaia/pull/8253 Looks alright, but I would like Yuren to make sure of it.

Comment on attachment 716886 [details] Pointer to Github pull request: https://github.com/mozilla-b2g/gaia/pull/8253 looks good for me.

need someone to pull it

please squash your change to 1 commit then I'll merge it to master.

This has been squashed, but I don't have merge permissions so if you can merge this :yurenju.

Merged, thanks!