[sethammons]

And if the app becoming faster doesn't mean anything because the app is waiting for user input the whole time, it was a lot of work for naught.

Perhaps restated: If the optimization cannot be felt (ie, impact on the product experience), it is not an optimization worth pursuing.

[eru]

> And if the app becoming faster doesn't mean anything because the app is waiting for user input the whole time, it was a lot of work for naught.

Oh, that might still be good for battery life (or power consumption in general).

[progmetaldev]

This one is more dangerous, as there may be backend resources in use that could be optimized, which could drop costs drastically. This may not change anything for your users, but is definitely worth exploring when it comes to getting the most out of your investment.