Review Request: Implemented multithreading in KFileItemModelSortAlgorithm

[Mark Gaiser]

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dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.cpp
<http://git.reviewboard.kde.org/r/107025/#comment16473>

    (span > 100) is useless since you only get in this function if the span > 100 requirement is met.


- Mark Gaiser


On Oct. 25, 2012, 6:05 p.m., Emmanuel Pescosta wrote:
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> (Updated Oct. 25, 2012, 6:05 p.m.)
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> Review request for Dolphin and Frank Reininghaus.
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> Description
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> Implemented multithreading in KFileItemModelSortAlgorithm.
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> If more than 100 items to sort and ideal thread count is greater than 1 -> sort them with parallelSort (2 Threads)
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> 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 ;)
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> Diffs
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>   dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.h 3a596df 
>   dolphin/src/kitemviews/private/kfileitemmodelsortalgorithm.cpp e0aac13 
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> Diff: http://git.reviewboard.kde.org/r/107025/diff/
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> Testing
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> About 2 seconds faster with sorting 500.000 files.
> About 5 seconds faster with sorting 1.000.000 files.
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> Thanks,
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> Emmanuel Pescosta
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