-Testing:
-o Giant runs.
-o Records of odd lengths.
-o Empty files.
-
-Improvements:
-o Use radix-sort for internal sorting.
-o Parallelization of internal sorting.
-o Clean up data types and make sure they cannot overflow. (size_t vs. u64 vs. sh_off_t vs. uns)
-o Switching between direct and normal I/O.
-o Deal with too rough range estimates in radix splitting.
-o How does the speed of radix splitting decrease with increasing number of hash bits?
- Does it help to use more bits than we need, so that we sort less data in memory?