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Subject: Re: [boost] Review Request: Algorithm.Sorting
From: Jeffrey Bosboom (jbosboom_at_[hidden])
Date: 2009-05-05 13:05:58

Steven Ross wrote:
> I thought of another optimization for mostly-sorted data. Currently I
> preprocess data so that mostly-sorted data won't be swapped as much, in a
> fashion that doesn't substantially impact unsorted data performance (<1%
> penalty). During that preprocessing, I could make good estimate of how
> well-sorted the data is, and if it is highly sorted (say >80% sorted),
> then
> I could quit out and use std::sort. That way the penalty on mostly-sorted
> data for using integer_sort on Windows would be much smaller.
> The bad part of that is it would eliminate the speed improvement seen on
> MacOSX for mostly-sorted data, which is substantial, instead having a
> small
> net penalty. I decided not to make this change for that reason, but I
> wanted to mention it as a possibility.
> Comments?
> _______________________________________________
> Unsubscribe & other changes:

If the mostly-sorted penalty is Windows-specific, you could consider using
macros to select which version to use based on the platform in use.

--Jeffrey Bosboom

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