For the uninformed: counting backwards in a for loop is faster because comparing an unsigned integer against 0 is generally faster than comparing it against any other value.
It also says not to use `for (i >= 0)` because any unsigned integer is >= 0, and the loop will never end.
Optimizers eat stuff like this up. It'll restructure your loop however it wants.
> For the uninformed: counting backwards in a for loop is faster because comparing an unsigned integer against 0 is generally faster than comparing it against any other value.
No it's not. It generally makes no difference at all.
If you disagree, I dare you to write a benchmark that demonstrates a difference between forward and backward iteration on a modern CPU.
loading story #50300020