> I'm all for optimizing but is this really required these days? Of course it is. Even if it doesn't matter on your machine, your users will launch your code:

> I'm all for optimizing but is this really required these days? Of course it is. Even if it doesn't matter on your machine, your users will launch your code: * on a 10 years old PC * in train on a laptop with 10% battery left * on a computer with so many things running in the background that you'll be on the edge of thrashing * on a thermally throttled ultrabook * on an underpowered SBC * through foreign CPU arch emulation * [insert more cases here] In each of those scenarios, your code will either do its job well or be the source of frustration.