Reproduced on Ubuntu 15.04 r91 on an Aquaris E4.5. Immediately after
restarting the phone, in five trials, opening the "Storage" screen took
11 seconds, 10 seconds, 10 seconds, 10 seconds, and 10 seconds.

If two seconds with nothing changing on-screen is long enough for you to
start worrying whether something is wrong, then the "worry duration"
here is 10 seconds – 2 seconds = 8 seconds. For a GUI, that's extremely
long.

Fixing bug 1488005 would greatly lessen this bug, as well as most other
responsiveness problems in System Settings. In this case it would halve
the worry duration: 10 seconds – 2 seconds of highlighting the "Storage"
item – 2 seconds showing a skeleton screen – the first 2 seconds that
the spinner was visible = 4 seconds. So I strongly encourage fixing that
bug.

But a worry duration of 4 seconds is still 4 seconds too long, and that can't 
be eliminated by designer fiat. Calculating storage usage, on current 
filesystems, is one of those things that just takes a long time. Other systems 
deal with this by having custom placeholders on their equivalent screens during 
the calculation.
https://www.youtube.com/watch?v=ddb2NVd8G-g#t=23s - iOS
https://www.youtube.com/watch?v=LUfFIJ-BDs0#t=27s - Android
https://www.youtube.com/watch?v=7PTBC525udQ#t=45s - Windows Phone
Unless there's some magic we can perform that those other systems can't, we'll 
need to do the same.

** Changed in: ubuntu-system-settings (Ubuntu)
       Status: Triaged => In Progress

** Changed in: ubuntu-system-settings (Ubuntu)
     Assignee: Ken VanDine (ken-vandine) => Matthew Paul Thomas (mpt)

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https://bugs.launchpad.net/bugs/1422206

Title:
  Storage page takes about 6secs to open

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