Review Request 114460: Remove even more redundant data from KItemListViewLayouter

[Commit Hook]

-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/114460/#review46348
-----------------------------------------------------------


This review has been submitted with commit de3a06a268dc947872d41cb70b137a0f0889aa05 by Frank Reininghaus to branch master.

- Commit Hook


On Dec. 14, 2013, 6:37 p.m., Frank Reininghaus wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/114460/
> -----------------------------------------------------------
> 
> (Updated Dec. 14, 2013, 6:37 p.m.)
> 
> 
> Review request for Dolphin.
> 
> 
> Repository: kde-baseapps
> 
> 
> Description
> -------
> 
> After https://git.reviewboard.kde.org/r/113487/, KItemListViewLayouter still stores quite a bit of redundant data.
> 
> For every item, we store the coordinates of its top-left corner in a QPointF 'pos' in the ItemInfo struct. This requires
> 
> 2 * "number of items" doubles.
> 
> However, pos.x is the same for all items in one column, and pos.y is the same for all items in a row. Therefore, some memory can be saved by removing the 'pos' member, and adding two QVector<qreal>
> 
> m_rowOffsets and m_columnOffsets
> 
> instead. This reduces the memory requirement to
> 
> "number of rows + number of columns" doubles, which is at least 50% less.
> 
> 
> Diffs
> -----
> 
>   dolphin/src/kitemviews/private/kitemlistviewlayouter.h a3b0893 
>   dolphin/src/kitemviews/private/kitemlistviewlayouter.cpp f5f63d5 
> 
> Diff: https://git.reviewboard.kde.org/r/114460/diff/
> 
> 
> Testing
> -------
> 
> Verfified with KSysGuard that the memory consumption is reduced as expected. View layout and scrolling still seem to work OK in all view modes and with grouping enabled or disabled.
> 
> 
> Thanks,
> 
> Frank Reininghaus
> 
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.kde.org/mailman/private/kfm-devel/attachments/20131229/36f2b785/attachment.htm>