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This is a port of the standard library's
slice::sort_by_cached_key
asParallelSliceMut::par_sort_by_cached_key
. We can do the initial key-caching indexedcollect
in parallel, and then usepar_sort_unstable
on that, but the final rearrangement on the original slice is still sequential.The new benchmarks test integers with a
to_string
key, and it looks great on my Ryzen 7 5800X:While I was in the neighborhood, I also updated documentation changes in the other sorting methods that were ported from the standard library.