e781e1fdba
For reasons not yet fully understood, `Main.uiGroup.add_actor` takes around
10 milliseconds to complete.
Because of this, each `actor.opacity = 0` has a good chance of falling
on a different frame. And when it does, `_opacityChangedId` also lands
on multiple different frames each incurring a separate relayout cycle.
It is this excessive number of relayouts that causes stuttering in the
icon grid animation (#2065). But it is the slowness of `uiGroup.add_actor`
that causes the number to be excessive when it should be one.
By creating the clones and adding them to `uiGroup` early, we then enable
the existing loop starting the animation to complete within a single frame.
And by completing within a single frame all the opacity changes land within
the same frame interval, thus incurring only a single relayout instead of
many.
This issue went unnoticed until
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| .. | ||
| extensionPrefs | ||
| gdm | ||
| misc | ||
| perf | ||
| portalHelper | ||
| ui | ||
| js-resources.gresource.xml | ||
| meson.build | ||
| portal-resources.gresource.xml | ||
| prefs-resources.gresource.xml | ||