It is true that user often isn't that interested in the apps used in the
very past so in that sense we could restrict the number of apps in
spread to some arbitrary value (option 2). But from usability
perspective option 1 would be way better. If we restrict the number of
"open" apps it could just make users wonder why not all recently used
apps are shown. And if we go with the option 2 we would need to have in
any case some screenshot recycling mechanism because we don't know when
we run out of RAM.
I had a chat with Daniel and mzanetti and option 1 is totally feasible
from technical point of view. Daniel pointed out that we should still
have some high sanity check upper limit value for apps count so that we
can start freeing space from disk when app count goes above say 100.
** Description changed:
What should we do when there's a large number of dead applications
(automatically killed due to out-of-memory situations) in the spread?
Option 1 - Keep them all in the spread
We must them unload those app screenshots (move them to disk) to save
memory. If the user has a lot of dead apps in the spread, even though
the apps themselves are not taking up memory space anymore, their
respective screenshots in the spread still do.
So oldest of those dead apps that are not being displayed on the spread
should have their screenshot images unloaded and saved to disk. If the
user then scrolls the spread making them visible again they should be
loaded back from disk.
There's the risk that if the user is flicking too fast down to the
oldest apps, he might see screenshots popping in as they're reloaded
from disk.
Option 2 - Automatically remove the oldest dead ones
Simpler to implement and there's no risk of running into the "texture pop in"
situation described above.
It also save the user the burden of manually removing apps he doesn't care
anymore and probably forgot about long ago.
+
+ -----------------------
+ Desired solution:
+
+ Option 1 with upper limit value 100. See the reasoning from comment
+ section below.
** Changed in: ubuntu-ux
Status: Triaged => Fix Committed
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https://bugs.launchpad.net/bugs/1364009
Title:
[Spread] A continuously growing number of dead applications in the
spread use more and more memory
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