Best energy strategy

Hi everyone, :) I'm doing a datalogging with Arduino and into the sketch I could follow two different way... I have to lounch my loop every hour and I could put a delay of 3600000 at the end or I could put an IF at the start of the loop as... IF minutes=0 and second=0... soo read and do everythings.

My question is... About energy consuption is better to follow the first or the second way? Or anythings changes??!

The project is charged by a LiIon battery, so the energy saving is important!

ps: sorry for my english!

Thanks

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About energy consuption is better to follow the first or the second way?

The processor is running all the time in either case.

Look at using sleep

Ok, perfect. Thank you very much
I’ll look at it.