I have an app that I added a lot of animation to. The app also used "iPhone sleep preventer" to play silent audio. Since then, I noticed that the battery consumption increased by up to 4 times! I'd like to find a method to profile the power consumption (I think I saw an option in Instruments) to find and eliminate the offending method(s).
Where would I start looking for information like this? Currently I have the phone left on the desk for ~3 hours to record power drain over time. Is there a better method to predict when the app will run out of power if running my app continuously?
An extra side question: are the % of battery left displayed in the status bar linear or is there some non-linearity towards the end of the battery life?
Edit: I found a "power" preset in xcode>product>profile>CPU>Energy diagnostics. It doesn't seem to work perfectly, as the power consumption level is always 0/20. But it does tell me how much of the CPU time is spent on app foreground, graphics and music!
Now I dont know how the CPU power is managed, is running the CPU at 75% more power consuming than lets say 30%? Intuitively it feels like it should...
Thank you!
I'm no expert. Im fact I am only starting to power profile a iphone today, and looked upon your question here in hope off learning.
So I will share with what I've found in meanwhile. On IOS Developer Library I have found the following:
And you have a report of Cpu and energy during the time of the log. You can find this steps and many more info on this section of the IOS Dev. lib.
I am still a bit fresh on this matter, so if you find anything that you think is meaningful please post that info here.
Edit: The apple dev lib suffered some changes. Updated link