Is it better to perform the same calculation multiple times?

When optimizing onDraw of a custom view, I found alot of object allocations in the onDraw method of that library.

What I don't know is if it's more efficient to calculate the same calculation multiple times or allocate one calculation to an object an reuse that object?

I want to hear your opinion about this, since it will be allot of work to change this "property" of the code.

Thanks,

Tim

Asus Zenfone 2 ZE551ML batter perform better in cold conditioning

Hello guys,

I noticed much better improvement over battery life while in cold condition room,i charged my phone and I was surfing internet with wi-fi and location on for 2 hours,and it was on 99% after that 2 hours!
So I think asus developers should mostly work on decreasing of battery overheat...Phone was cold for the first time while using him for 2 hours and performed great in battery life...
I know this sounds stupid,but I think when batter overheats it drains quicker for sure.
Thank you!