Re: [boost] [sorting] Taking away quicksort and mergesort

From: David Abrahams (dave_at_[hidden])
Date: 2007-03-18 14:21:40

on Sat Mar 17 2007, Rene Rivera <grafikrobot-AT-gmail.com> wrote:

> Hervé Brönnimann wrote:
>> Rene: What do you mean by "tighter complexity bounds"?  Just curious,
>
> I meant tighter guarantees of the complexity of the algorithm, in big O. 
> The customary quicksort is usually O(NlogN) on most sequences, but it 
> can be as high as O(N2). The quicksort variant I have has a guaranteed 
> worst case of O(NlogN). The price for that guarantee is a larger K 
> overall. Which if one is using objects for which the comparison is 
> expensive is a better trade off.

How is your version different from introsort?

http://en.wikipedia.org/wiki/Introsort

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com