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Groups > comp.lang.c++ > #47435
| From | bartekltg <bartekltg@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Qucksort for Linked List |
| Date | 2016-12-19 15:04 +0100 |
| Organization | ATMAN - ATM S.A. |
| Message-ID | <o38pcj$vja$1@node2.news.atman.pl> (permalink) |
| References | (8 earlier) <o30hk4$112$1@adenine.netfront.net> <ANqdnaKugKq-78nFnZ2dnUU7-VWdnZ2d@giganews.com> <kfnpokrdor0.fsf@x-alumni2.alumni.caltech.edu> <o384ef$1irf$1@adenine.netfront.net> <c2dff3d8-e8f3-4c2a-901c-21682bb22918@googlegroups.com> |
On 19.12.2016 13:46, leigh.v.johnston@googlemail.com wrote: > Answer me this: why do all std::list::sort implementations use merge sort rather than qsort? > > Sausage sorting is a tricky business. And why std::sort uses introsort (qsort + heapsort as fallback), and not, for example, in place merge sort? Both have complexity O(n log n). Because introsort is faster. Mergesort run log_2(n) times through the whole list. Qsort, 2 ln(2) log_2(n) = 1.39 log_2(n) times in average case (with median pivot a bit better, 1.188). Qsort for list is ~40% worse. But it is still a valid sorting methods for lists. Just not the best one nor the easiest one. bartekltg
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Qucksort for Linked List xerofoify <xerofoify@gmail.com> - 2016-12-02 10:14 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-02 19:17 +0000
Re: Qucksort for Linked List Melzzzzz <mel@zzzzz.com> - 2016-12-02 22:09 +0100
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-02 21:26 +0000
Re: Qucksort for Linked List Melzzzzz <mel@zzzzz.com> - 2016-12-02 22:37 +0100
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-02 21:41 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-12 13:16 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-12 18:32 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-12 18:34 +0000
Re: Qucksort for Linked List asetofsymbols@gmail.com - 2016-12-12 10:44 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-12 21:30 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-13 07:26 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-13 17:51 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-13 14:52 -0800
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-14 10:26 +0000
Re: Qucksort for Linked List "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2016-12-14 13:05 +0100
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-14 14:06 +0000
Re: Qucksort for Linked List "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2016-12-14 16:59 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-14 20:19 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-14 21:23 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-14 21:42 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-14 22:43 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-16 11:02 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-16 23:00 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-16 23:00 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-17 20:17 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-18 21:15 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-18 21:49 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-18 21:51 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-18 21:52 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-18 21:56 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-18 22:04 +0000
Re: Qucksort for Linked List Paavo Helde <myfirstname@osa.pri.ee> - 2016-12-19 00:22 +0200
Re: Qucksort for Linked List "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2016-12-19 00:18 +0100
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-19 08:58 +0100
Re: Qucksort for Linked List gwowen <gwowen@gmail.com> - 2016-12-19 06:17 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-19 20:14 +0000
Re: Qucksort for Linked List woodbrian77@gmail.com - 2016-12-23 10:55 -0800
Re: Qucksort for Linked List Daniel <danielaparker@gmail.com> - 2016-12-23 12:08 -0800
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-27 10:39 +0100
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 17:48 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 17:53 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-27 18:52 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 19:06 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-27 19:17 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 21:05 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-27 21:15 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 21:21 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-27 21:29 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-27 21:33 +0000
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-28 10:03 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-28 15:34 +0000
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-29 09:38 +0100
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-28 16:40 +0000
Re: Qucksort for Linked List Daniel <danielaparker@gmail.com> - 2016-12-28 08:55 -0800
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-28 17:02 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-28 17:12 +0000
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-28 17:21 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-29 11:05 -0600
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-29 17:43 +0000
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-30 09:48 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-30 11:37 +0000
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-30 13:23 +0100
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-29 11:00 +0100
Re: Qucksort for Linked List David Brown <david.brown@hesbynett.no> - 2016-12-29 09:43 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-18 22:56 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-18 22:52 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-18 23:07 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-19 05:48 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-19 08:09 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-19 08:06 +0000
Re: Qucksort for Linked List leigh.v.johnston@googlemail.com - 2016-12-19 04:46 -0800
Re: Qucksort for Linked List bartekltg <bartekltg@gmail.com> - 2016-12-19 15:04 +0100
Re: Qucksort for Linked List gwowen <gwowen@gmail.com> - 2016-12-19 06:40 -0800
Re: Qucksort for Linked List bartekltg <bartekltg@gmail.com> - 2016-12-19 18:48 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-19 18:53 +0000
Re: Qucksort for Linked List bartekltg <bartekltg@gmail.com> - 2016-12-19 21:26 +0100
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-19 20:32 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-19 19:09 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-19 19:14 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-19 19:31 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-19 19:45 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-19 20:19 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-20 07:18 +0000
Re: Qucksort for Linked List leigh.v.johnston@googlemail.com - 2016-12-20 04:31 -0800
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-21 07:08 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-21 19:39 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-21 20:54 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-21 19:28 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-21 19:43 +0000
Re: Qucksort for Linked List Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-12-21 20:34 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-21 20:53 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-21 20:58 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-21 23:34 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-22 00:19 +0000
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2017-01-04 07:04 +0000
Re: Qucksort for Linked List Daniel <danielaparker@gmail.com> - 2017-01-04 07:18 -0800
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2017-01-04 18:39 +0000
Re: Qucksort for Linked List Daniel <danielaparker@gmail.com> - 2017-01-05 07:29 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2017-01-05 21:21 +0000
Re: Qucksort for Linked List Ian Collins <ian-news@hotmail.com> - 2017-01-06 10:35 +1300
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-22 21:43 -0800
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-22 22:09 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-23 17:00 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-23 12:03 -0800
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-23 20:25 +0000
Re: Qucksort for Linked List Gareth Owen <gwowen@gmail.com> - 2016-12-23 20:56 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-23 22:02 +0000
Re: Qucksort for Linked List Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2016-12-23 22:14 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-29 13:56 -0800
Re: Qucksort for Linked List Mr Flibble <flibble@i42.co.uk> - 2016-12-29 23:26 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2016-12-29 20:25 -0800
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2017-01-04 07:07 +0000
Re: Qucksort for Linked List Tim Rentsch <txr@alumni.caltech.edu> - 2017-01-26 22:40 -0800
Re: Qucksort for Linked List xerofoify <xerofoify@gmail.com> - 2016-12-02 13:47 -0800
Re: Qucksort for Linked List ruben safir <ruben@mrbrklyn.com> - 2016-12-02 17:38 -0500
Re: Qucksort for Linked List xerofoify <xerofoify@gmail.com> - 2016-12-02 14:53 -0800
Re: Qucksort for Linked List Jerry Stuckle <jstucklex@attglobal.net> - 2016-12-02 19:50 -0500
Re: Qucksort for Linked List ruben safir <ruben@mrbrklyn.com> - 2016-12-02 21:17 -0500
Re: Qucksort for Linked List xerofoify <xerofoify@gmail.com> - 2016-12-02 20:44 -0800
Re: Qucksort for Linked List xerofoify <xerofoify@gmail.com> - 2016-12-02 20:52 -0800
Re: Qucksort for Linked List Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-12-03 11:07 +0000
Re: Qucksort for Linked List ruben safir <ruben@mrbrklyn.com> - 2016-12-03 13:38 -0500
Re: Qucksort for Linked List Öö Tiib <ootiib@hot.ee> - 2016-12-03 01:46 -0800
Re: Qucksort for Linked List Juha Nieminen <nospam@thanks.invalid> - 2016-12-12 13:18 +0000
Re: Qucksort for Linked List "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2016-12-03 01:16 +0100
Re: Qucksort for Linked List bartekltg <bartekltg@gmail.com> - 2016-12-03 08:25 +0100
Re: Qucksort for Linked List bartekltg <bartekltg@gmail.com> - 2016-12-03 08:05 +0100
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