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huh? This doesn't really have anything to do with climate change. Energy consumption is an important software performance metric, measuring it is the first step to optimizing that aspect of the software. Normally this sort of thing is done with low power microcontrollers, this article is just talking about techniques applicable to higher level systems.

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This blog post is part of a "green software" movement that's trying to guilt-trip programmers for wasting energy.

I mean, don't do it for the "green". Do it for longer battery life for your users.

You don't even need to care about your users' batteries. Do it so your battery usage is less than other apps, so your users don't delete your app because it uses too much battery. (This is the same reason you need to optimize your app size, although remove app can sort by size and not battery use, AFAIK)

Precisely.

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