Selectmenu Custom: long list should popup on same page

[Ruffio]

I was testing #6578 LG G3 Chrome 38 and noticed the working on long list. It goes like this:
Page is scrolled to top
Page is faded out
New page is faded in (I think)
Long list is faded in
Upon selection the reverse is happening

Is this really the most optimal UX/performance way to do it?
I think it would be better UX and performance to keep the long list on the original page like a short list.

[arschmitz]

@Ruffio its actually not quite that way. the actual sequence is...

1. the page is scrolled to top
2. the page is faded out to white
3. the new page ( which is the list ) is faded in
   and yes the reverse happens on selection.

the only non optimal part i see here is the scroll to top.
This is essentially unavoidable for a long list of reason I wont get into here.

Is there a different part you think could be improved?

[Ruffio]

@arschmitz why not stay on the same page and fade in a 'normal' popup? Why does it have to fade to a new page? It's the fading that takes time. The scrolling to top and back again when coming back is working perfectly and happens immediately.

[arschmitz]

This is the entire concept of this widget is to fall back to a new page because scrolling of popups can be weird on mobile devices ( really really bad when fixed position is used ) so to make it usable we open it as a dialog. If speed is your concern disable transitions and there will be essentially no time involved.

That being said this widget is on its way out. We will be switching to the jQuery UI selectmenu once it has all the options we need. ( likely 1.6 ) this will not have a full page fallback like this. We will not be doing any updates to the current widget only fixing bugs until then. This widget instead of falling back to a full page will fall back to the native menu ( this will be an option and only on mobile devices which use a soft keyboard for select menus )

@Ruffio thank you for your suggestions but I'm going to close this as wont fix