Timsort

Timsort
Timsort
概况
类别	排序算法
数据结构	数组
复杂度
平均时间复杂度
最坏时间复杂度
最优时间复杂度
空间复杂度
相关变量的定义

Timsort 是一种混合稳定的排序算法，源自合并排序和插入排序，旨在较好地处理真实世界中各种各样的数据。它使用了 Peter Mcllroy 的"乐观排序和信息理论上复杂性"中的技术，参见 第四届年度ACM-SIAM离散算法研讨会论文集，第467-474页，1993年。它由 Tim Peters 在2002年实现，并应用于 Python编程语言。该算法通过查找已经排好序的数据子序列，在此基础上对剩余部分更有效地排序。该算法通过不断地将特定子序列（称为一个 run ）与现有的 run 合并，直到满足某些条件为止来达成的更有效的排序。从 2.3 版本起，Timsort 一直是 Python 的标准排序算法。它还被 Java SE7^[4], Android platform^[5], GNU Octave,^[6] 谷歌浏览器,^[7] 和 Swift^[8] 用于对非原始类型的数组排序。

参考文献

^ Peters, Tim. [Python-Dev] Sorting. Python Developers Mailinglist. [24 February 2011]. （原始内容存档于2018-07-17）. [Timsort] also has good aspects: It's stable (items that compare equal retain their relative order, so, e.g., if you sort first on zip code, and a second time on name, people with the same name still appear in order of increasing zip code; this is important in apps that, e.g., refine the results of queries based on user input). ... It has no bad cases (O(N log N) is worst case; N−1 compares is best).
^ [DROPS]. [1 September 2018]. （原始内容存档于2019-09-19）. TimSort is an intriguing sorting algorithm designed in 2002 for Python, whose worst-case complexity was announced, but not proved until our recent preprint.
^ Chandramouli, Badrish; Goldstein, Jonathan. Patience is a Virtue: Revisiting Merge and Sort on Modern Processors. SIGMOD/PODS. 2014.
^ [#JDK-6804124] (coll) Replace "modified mergesort" in java.util.Arrays.sort with timsort. JDK Bug System. [11 June 2014]. （原始内容存档于2020-01-11）.
^ Class: java.util.TimSort<T>. Android Gingerbread Documentation. [24 February 2011]. （原始内容存档于2015-07-16）.
^ liboctave/util/oct-sort.cc. Mercurial repository of Octave source code. [18 February 2013]. （原始内容存档于2019-02-06）. Code stolen in large part from Python's, listobject.c, which itself had no license header. However, thanks to Tim Peters for the parts of the code I ripped-off.
^ Getting things sorted in V8 · V8. v8.dev. [2018-12-21]. （原始内容存档于2018-12-21）.
^ Is sort() stable in Swift 5?. Swift Forums. 2019-07-04 [2019-07-04]. （原始内容存档于2019-07-04）（美国英语）.

外部链接

[1] Peters, Tim. [Python-Dev] Sorting. Python Developers Mailinglist. [24 February 2011]. （原始内容存档于2018-07-17）. [Timsort] also has good aspects: It's stable (items that compare equal retain their relative order, so, e.g., if you sort first on zip code, and a second time on name, people with the same name still appear in order of increasing zip code; this is important in apps that, e.g., refine the results of queries based on user input). ... It has no bad cases (O(N log N) is worst case; N−1 compares is best).

[2] [DROPS]. [1 September 2018]. （原始内容存档于2019-09-19）. TimSort is an intriguing sorting algorithm designed in 2002 for Python, whose worst-case complexity was announced, but not proved until our recent preprint.

[Chandramouli-3] Chandramouli, Badrish; Goldstein, Jonathan. Patience is a Virtue: Revisiting Merge and Sort on Modern Processors. SIGMOD/PODS. 2014.

[4] [#JDK-6804124] (coll) Replace "modified mergesort" in java.util.Arrays.sort with timsort. JDK Bug System. [11 June 2014]. （原始内容存档于2020-01-11）.

[5] Class: java.util.TimSort<T>. Android Gingerbread Documentation. [24 February 2011]. （原始内容存档于2015-07-16）.

[6] tave/util/oct-sort.cc. Mercurial repository of Octave source code. [18 February 2013]. （原始内容存档于2019-02-06）. Code stolen in large part from Python's, listobject.c, which itself had no license header. However, thanks to Tim Peters for the parts of the code I ripped-off.

[7] Getting things sorted in V8 · V8. v8.dev. [2018-12-21]. （原始内容存档于2018-12-21）.

[8] Is sort() stable in Swift 5?. Swift Forums. 2019-07-04 [2019-07-04]. （原始内容存档于2019-07-04）（美国英语）.

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