WTF no comments

So, I'm reading some source code from Plan 9, and I just realized that it's nearly uncommented. I expected a little more from Rob Pike.

Some code doesn't need to be commented. Explaining what well-written code does is like the classic example of overcommenting, "i++;    /* increment i by 1 */".

(I don't believe that Activision would have that sort of code though. Game programmers generally aren't on the level of the Plan 9 guys.)