As management author and legend Peter Drucker said, “There is nothing quite so useless, as doing with great efficiency, something that should not be done at all.” Effectiveness

you simply can’t think efficiency with people. You think effectiveness with people and efficiency with things.

Larry implored us to exert more control over our careers. He said McKinsey would never stop making demands on our time, so it was up to us to decide what we were willing to do. It was our responsibility to draw the line. We needed to determine how many hours we were willing to work in a day and how many nights we were willing to travel. If later on, the job did not work out, we would know that we had tried on our own terms. Counterintuitively, long-term success at work often depends on not trying to meet every demand placed on us. The best way to make room for both life and career is to make choices deliberately — to set limits and stick to them.

Management scholar Peter Drucker nailed it decades ago when he said “There is nothing so useless as doing efficiently that which should not be done at all.” Bam!

If you try to fiddle around with your code to make it efficient, that's the wrong thing to do. Keep on track with the latest hardware. That's the right thing to do.