[NiLuJe]

Note that it is opt-in, because while a Sage takes < 10ms to resume, an older device will take ~200ms!

Spoiler alert: this is (part) of why page turns feel atrociously slow in nickel.

(In my book, that makes it a terrible trade on older devices: you tank UI latency for meager power efficiency gains (because nxp SoCs are fairly power efficient to begin with). On sunxi, not so much ;p).