Hi, I'm a bit confused that the sort method of a string character doesn't allow a mergesort:
s = numpy.empty(10, "S10") s.sort(kind="merge") TypeError: desired sort not supported for this type
However, by looking at the numpy sources, it seems that the only implemented method for sorting array strings is "merge" (I presume because it is stable). So, perhaps the message above should be fixed. Also, in the context of my work in indexing, and because of the slowness of the current implementation in NumPy, I've ended with an implementation of the quicksort method for 1-D array strings. For moderately large arrays, it is about 2.5x-3x faster than the (supposedly) mergesort version in NumPy, not only due to the quicksort, but also because I've implemented a couple of macros for efficient string swapping and copy. If this is of interest for NumPy developers, tell me and I will provide the code. Cheers, --
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