I thin it's important to think about the context of "machine time". If "machine time" is some computer somewhere that only runs your code, then sure. Even as a

I thin it's important to think about the context of "machine time". If "machine time" is some computer somewhere that only runs your code, then sure. Even as a customer, it might be cheaper to just pay more for a beefier machine than to pay more for optimizing the software. But when you're building human user-facing apps, you can't always just get a faster computer. As others have said, many instances of lag in windows can be traced to network calls. A 64-core monster would probably wait around just as long as my ultra-low voltage, several year-old lazy ultrabook.