Review Request: Implemented multithreading in KFileItemModelSortAlgorithm

[Frank Reininghaus]

> On Oct. 25, 2012, 6:26 p.m., Mark Gaiser wrote:
> > dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.cpp, line 68
> > <http://git.reviewboard.kde.org/r/107025/diff/4/?file=92354#file92354line68>
> >
> >     (span > 100) is useless since you only get in this function if the span > 100 requirement is met.

This is incorrect. Note that the function calls itself recursively.


- Frank


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On Oct. 25, 2012, 7:42 p.m., Emmanuel Pescosta wrote:
> 
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> http://git.reviewboard.kde.org/r/107025/
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> 
> (Updated Oct. 25, 2012, 7:42 p.m.)
> 
> 
> Review request for Dolphin and Frank Reininghaus.
> 
> 
> Description
> -------
> 
> Implemented multithreading in KFileItemModelSortAlgorithm.
> 
> If more than 100 items to sort and ideal thread count is greater than 1 -> sort them with parallelSort (2 Threads)
> 
> Use maximal 2 Threads, because more than 2 Threads are "slower" (more overhead than speed up). (I also have a patch which uses n Threads for sorting, if you want test it ;)
> 
> 
> Diffs
> -----
> 
>   dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.h 3a596df 
>   dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.cpp e0aac13 
> 
> Diff: http://git.reviewboard.kde.org/r/107025/diff/
> 
> 
> Testing
> -------
> 
> About 2 seconds faster with sorting 500.000 files.
> About 5 seconds faster with sorting 1.000.000 files.
> 
> 
> Thanks,
> 
> Emmanuel Pescosta
> 
>

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