Engineering a sort function

@article{Bentley1993EngineeringAS,
  title={Engineering a sort function},
  author={Jon Louis Bentley and M. Douglas McIlroy},
  journal={Software: Practice and Experience},
  year={1993},
  volume={23}
}
We recount the history of a new qsortfunction for a C library. Our function is clearer, faster and more robust than existing sorts. It chooses partitioning elements by a new sampling scheme; it partitions by a novel solution to Dijkstra's Dutch National Flag problem; and it swaps efficiently. Its behavior was assessed with timing and debugging testbeds, and with a program to certify performance. The design techniques apply in domains beyond sorting. 

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