Algorithmic Ideas, Engineering Tricks, and Trivia Behind CPython's New Sorting Algorithm

Algorithmic Ideas, Engineering Tricks, and Trivia Behind CPython's New Sorting Algorithm

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Outline

2 of 14

2 of 14

Outline

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Algorithmic Ideas, Engineering Tricks, and Trivia Behind CPython's New Sorting Algorithm

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  1. 1 Intro
  2. 2 Outline
  3. 3 Stable Sorting
  4. 4 CPython Sorting History
  5. 5 Timsort merge policy (original)
  6. 6 Invariant trouble
  7. 7 Timsort merge policy (patched)
  8. 8 Timsort bad case
  9. 9 Merge policies from first principles
  10. 10 Mergesort meets Binary Search Trees
  11. 11 Run-Boundary Powers are Local
  12. 12 Some performance data
  13. 13 Bonus: Multiway powersort
  14. 14 Conclusion

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