Comment optimize algorithms, not syntax (Score 1) 1422
If you're trying to speed your program up by writing source code to compile optimally, one of two things is happening: 1) you're at the bleeding edge, writing some inner loop that's gonna run 1E14 times on a Cray, or 2) you're wasting your time. I've always found that when my program is too slow, it's because I'm not using clever enough high-level algorithms.