Following up on the thread at [https://forum.nim-lang.org/t/3169](https://forum.nim-lang.org/t/3169), I took the code and replaced every instance of `a..<b` with `a..b-1` whether in `for i in a..<b` or in `arr[a..<b]` and the code was almost 2 seconds faster for one benchmark. So not only being confusing and non-intuitive it's way slower than using explicit numerical bounds.
In Ruby `a..b` is used to include `from a to b` whereas `a...b` is the equivalent of `a..b-1`.
