Any profiler. As a development tool: You can default to writing the majority of your code dumb, terse[1], and straightforward, even if you know there's a cleve

Any profiler. As a development tool: You can default to writing the majority of your code dumb, terse[1], and straightforward, even if you know there's a clever algorithm you might be able to use, because that way is easier to debug. Computers are fast and N is usually smaller than you think, and when you apply the profiler you'll find out that that the biggest performance problem isn't the thing you were going to optimize anyway. As a product tool: People are more likely to buy responsive programs. The state of modern websites is so bad that non-programmers will actually comment. Every tester for Space Trains[2] commented on how smooth it is. That's a game, but I've seen the same comments on productivity software I've written. [1] As in omitting layers, not as in omitting descriptive variable names. [2] https://www.youtube.com/watch?v=LRJP0tie-30 https://www.youtube.com/watch?v=LRJP0tie-30