Am I the only person who is impressed with this person's debugging skill?
All he's shown is a behavior (high CPU) and is equating it with the latitude he's at. When he turns off Night Shift, the daemon process for the feature stops consuming as much CPU, from what I gathered. Nowhere does he provide evidence that there is an infinite loop calculating the sunrise/sunset.
And I really don't want to be a stereotypical poster by simply degrading what he did, so I will give credit to him for knowing where to look and making a hypothesis that is not wrong. He's perfectly on point to _begin_ a debugging process, but I can't see he's found a bug. He's found an unexpected or undesired behavior. I certainly would consider this story/tweet as a huge plus if he were being interviewed by me for an engineering position, but it appears he's already well above my pay grade anyways.
This depends on your definition of "bug". I think, in the classical sense, a bug is something that you understand both the cause and the resultant undesired behaviour and, as of consequence, you can reproduce the chain of events.
Given that definition, I would be disinclined to agree with calling it a "bug".
However, I would also like to point out that we're getting so nuanced in terms that we're, quite literally, dropping the notion of lauding the attempts of the OP to go down the road of wanting to deduce the problem, themselves.
If I write a program that computes 2+2 and it tells me the answer is 5, that’s a bug. Why is irrelevant until I want to fix it.
Anyways, thanks!
On mobile devices the only indications we have that something is wrong is warm devices and lower battery lives, which are far less immediate. And we don't have the detailed CPU usage that desktop devices provide. Maybe we need a simulated fan sound when our devices are being pushed too hard.
For example apparently Chrome used 3% of the battery life so far today whereas a game I was just playing already consumed 5%
With the improved security model, that now only shows the bash and top processes.
For iOS the Battery settings are usually good at telling you about power drain.