[jira] Commented: (STDCXX-138) Complexity tests are not strict enough for some algorithms when the expected complexity is a function of the given sequence length (not exact count)

["Martin Sebor (JIRA)" <ji...@apache.org>]

    [ http://issues.apache.org/jira/browse/STDCXX-138?page=comments#action_12365508 ] 

Martin Sebor commented on STDCXX-138:
-------------------------------------

See this thread for background:
http://mail-archives.apache.org/mod_mbox/incubator-stdcxx-dev/200602.mbox/%3c43E80945.4060503@roguewave.com%3e

> Complexity tests are not strict enough for some algorithms when the expected complexity is a function of the given sequence length (not exact count)
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: STDCXX-138
>          URL: http://issues.apache.org/jira/browse/STDCXX-138
>      Project: C++ Standard Library
>         Type: Improvement
>   Components: 25. Algorithms
>     Versions: 4.1.3
>  Environment: all
>     Reporter: Anton Pevtsov
>     Priority: Minor
>      Fix For: 4.1.4

>
> Affects tests for sort, stable_sort, partial_sort, partial_sort_copy, nth_element, etc algorithms where the complexity is O(f(N)), where N is the length of the test sequence, f(N) - some function of N: log N, N log N, N. 
> It is necessary to investigate each algorithm to find the worst case for it and use the complexity on this worst sequence as the upper bound in tests. Currently "magic" coefficients are used.

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