Just to make it clear, what this change would do is look for a non-wildcard prefix of the `iter->glob` string and use it as the start and end point for the iterator. You still have to call `p_fnmatch` to validate against the actual glob pattern, but for the common case where there is a simple prefix, you can use the `start` and `end` prefix values of the iterator to reduce the number of items you actually iterate over.