As an extreme example of power cycling, I was refactoring a slow function in some simulation code and replacing some hash-based look ups with some pointer arith

As an extreme example of power cycling, I was refactoring a slow function in some simulation code and replacing some hash-based look ups with some pointer arithmetics. I must have spent several hours writing and re-writing that function, and I still couldn't get the tests to pass. I went over all the code character by character, debugging, etc, and I just couldn't figure out where it wasn't working. Eventually, I just nuked all the work I did that morning, rewrote that entire routine from scratch, and it worked perfectly.