In bug 840627, we discovered that using section logos with alpha channel was taking 180ms more on startup than using the same logos without an alpha channel. Because of that, we created two versions of those logos with the background hardcoded (inactive [1] and active state [2]). It's creating maintenance problems obviously but it also means decoding an extra sprite when the user taps a section. Could we make those images with alpha channels faster? [1] https://github.com/mozilla-b2g/gaia/blob/master/apps/settings/style/images/icons_sprite.gif [2] https://github.com/mozilla-b2g/gaia/blob/master/apps/settings/style/images/icons_sprite_active.gif

(In reply to Anthony Ricaud (:rik) from comment #0) > > Could we make those images with alpha channels faster? Can you profile the slow case?

I don't have a phone with the proper setup for profiling. But I've prepared a branch that has the alpha images. https://github.com/Rik/gaia/tree/settings-with-alpha-863201

Mass closing as we are no longer working on b2g/firefox os.

Mass closing as we are no longer working on b2g/firefox os.