Manage CPU consumption of Onion's Apps

[schmurtzm]

CPU consumption report : (Checked when it is solved /optimized)

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• [ ] - themeSwitcher : 50% -> too much 🔥
• [x] - infoPanel : 50% -> too much 🔥
• [x] - Search: 50% -> too much 🔥

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• [x] - playActivityUI : about 22%, seems a lot for a static UI ?
• [x] - gameSwitcher : 30% when 0 game in list , seems a lot for a static UI ?
• [ ] - clock: 26% , seems a lot for a static UI ?

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• [x] - installUI : about 30% probably due to SDL animation at the bottom ?
• [x] - chargingState : about 30-35% during animation, 0% when screen off

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• [x] - keymon & batmon : 0% 👍🏻
• [x] - packageManager : 0% 👍🏻
• [x] - Tweaks : 0% 👍🏻

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• [x] - bootScreen : too fast to really know...

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[Aemiii91]

installUI and chargingState are OK, they have animations.

bootScreen doesn't have a main loop, it's exits immediately after drawing to screen once.

[schmurtzm]

infopanel is fine when we put a sleep into the main while (just tested).

[Aemiii91]

Search improved by 486d2f10c133733a4250f090bc5c04ccdf452c93

[schmurtzm]

Theme Switcher & Clock still requires to be fixed in 4.2.3 ;)

[MattCatz]

Sorry to poke an old issue.

1. Any reason to not to enable compiler optimization by default? i.e. at least -Og ( I know -Os is enabled for a few of those ). Also enabling LTO for that cross compilation unit optimization?
2. With Clock specifically, the main event loop seems to run ungoverned. Could you save a bit of cycles by adding a little bit of delay in there and/or only redrawing if the time changes or you get a user input?

I'd be happy to test if you shared your test procedure.