Review Request 112979: Make use of multi-threading in KItemListSizeHintResolver

[Emmanuel Pescosta]

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Review request for Dolphin.


Description
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Make use of multi-threading in KItemListSizeHintResolver.

We need the item size hints of all items in KItemListLayouter::doLayout(),
so instead of resolving it sequentially during layout calculation, 
we can resolve all item size hints in parallel before we start the 
layout calculation.


Diffs
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  dolphin/src/kitemviews/private/kitemlistsizehintresolver.h 486f9b6 
  dolphin/src/kitemviews/private/kitemlistsizehintresolver.cpp 0e2286b 
  dolphin/src/kitemviews/private/kitemlistviewlayouter.h 306fcd3 
  dolphin/src/kitemviews/private/kitemlistviewlayouter.cpp d6e78ae 

Diff: http://git.reviewboard.kde.org/r/112979/diff/


Testing
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Everything works fine.

It is about 1/3 faster on my machine (tested with 100k items in item view mode).


Thanks,

Emmanuel Pescosta

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