As a datapoint, numpy also chooses between radix and timsort based on data type. From the docs [^0]: > ‘stable’ automatically chooses the best stable sorting a

As a datapoint, numpy also chooses between radix and timsort based on data type. From the docs [^0]: > ‘stable’ automatically chooses the best stable sorting algorithm for the data type being sorted. It, along with ‘mergesort’ is currently mapped to timsort or radix sort depending on the data type. API forward compatibility currently limits the ability to select the implementation and it is hardwired for the different data types. [^0]: https://numpy.org/doc/stable/reference/generated/numpy.sort.html https://numpy.org/doc/stable/reference/generated/numpy.sort....