One of my most productive days was throwing away 1000 lines of code.

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.

A program that produces incorrect results twice as fast is infinitely slower.

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.

Incorrect documentation is often worse than no documentation.