804332 - [Gaia::System] Transitions for Navigating Hierarchical List Screens (Going Deeper & Going Back) Perform Poorly

Status: RESOLVED WORKSFORME

(Firefox OS Graveyard :: Gaia::System, defect)

Description

[Peter La]

As an example, go into the Settings app and tap on Wi-Fi.  The transition should look like what is specified in the transitions document on page 9:
https://www.dropbox.com/s/5xbazzqs8i9vnji/Transitions_v10.pdf

Actual:
But the fps is low (< 10).  Most of the time, you can't even see the transition happening, or if you see it, it happens within 2-3 frames of animation and is really rough.

Expected:
fps should be 60+. Should start right away, instead of a delay.  The end of the transition should feel like a smooth deceleration/bounce.

Tested on: otoro_2012-10-22_ics_us

Comment 1

[Peter La]

Rewriting using perf/ux-trust bug template.

--

What makes it feel slow/broken?

When drilling deeper and going back in a hierarchical list (like the Settings app), there is a 1 sec. delay between when I tap the screen, to when the screen transitions (slide left and right) to go deeper or go back.

Did it prevent you from doing what you wanted? Why?

It makes navigating hierarchical lists feel slow.

How does this make you feel?

[ ]  :)  I feel happy about it
[ ]  :|  Meh
[X]  :(  I'm upset
[ ] >:O  I'm angry

Device: Unagi, Nov. 22 Nightly.

Details:

It takes 1 second before our transition animation starts.  On Otoro running Android ICS, it's instant.  See videos.

Bonus: can you attach a video of the problem?
Yes

Comment 2

[Mason Chang [Inactive] [:mchang]]

Perf reviewed, older bug. Lots of performance improvements sent last year. If performance issues still occur, we can reopen this bug.