[vilya]

I think that was true back when he wrote the words, but less so now. Even if you're not noticing a delay, code that completes quicker is generally code that uses less power and you can still notice the effect on your phones battery life - or on the size of your monthly bill from your data center.

[dahart]

Great point. Efficiency comes in different shapes. To respond, I'd say power & cost are human oriented metrics, and I take his point to be use a human oriented metric, for me it's as true now as it ever was.

[datenwolf]

Ah darn, I wrote along the same line an hour ago or so but got delayed in hitting the submit button until now. Yes, pretty much this.