AuroraOS/SailfishOS platform performance is unstable.

[lmaxyz]

Hi guys.

I run into problem with unstable performance on linux mobile platform.

Here is my config:

• I set SLINT_DEBUG_PERFORMANCE env to refresh_full_speed,overlay to check performance.
• I use my winit fork to make it work with legacy wayland, so some methods was mocked, and may be it's the source of problem, but I don't know where I should to look.

If I run simple example with only Text widget with animated font-size, it work almost with 60fps. I said "almost" because it has 60fps only if I'm touching and swiping screen or if "DeveloperMode" activated (see below).

If I run some complex layout with texts images and rectangles, It start to work with only 30fps (but it's stable fps). If I minimize and maximize window back it has surge of performance and fps grows up to 45 or 60 fps. Sometimes it locks on 60fps and from this moment continues rendering with 60fps.

And one more weird thing I met is that when I plug-in usb to device and activate "DeveloperMode" (it connects to PC by ssh), fps becomes more stable - for simple example it became smooth 60fps and for complex example there is only 30 but more stable fps.

Here is screenshots of complex example, that has different fps with no visible cause:

Screenshots

If you have any ideas, I'd like to hear.

[hunger]

@tronical is probably the most qualified to answer. He will most likely not be able to reply for the next couple of days though. Sorry.