Hi, I was reading back an mailing list thread i started about half a year ago [1]. Later on in that thread Aaron suggested a cool idea of "slave side" sorting [2].
At that time i found it cool, but didn't really see a need for it. Dolphin is doing a fine job at sorting anyway, so why would we bother moving it to the KIO side. Well, a good reason for moving it to the KIO side just became apparent to me when looking at this RR [3]. Sorting is already quite complex in Dolphin. Adding in QCollator while also using threads makes it a bit more nasty since a QCollator object per thread is required (hence the RR). Sure, the end result (and Dolphin is probably going to move there) is to use QCollatorSortKey which will make sorting quite a bit faster [4] and remove a QCollator requirement, but it won't be any cleaner. Quite the opposite, It will be more complicated due to the bookkeeping required to use QCollatorSortKey. All this sorting stuff is quite complicated and only available in Dolphin. Other people would need to duplicate it's efforts for the same results. That and considering that KIO is a framework that can be used by external (non KDE) parties made me think that having slave side sorting might be a very good thing to have. It would allow for performance optimizations that everyone can use and allows every KIO user to easily add sorting. It would completely remove a need for Dolphin to have sorting and would greatly simplify code that uses KIO. When sorting moves to KIO, then grouping should also move to KIO imho. The goal with this mail is to see if there is a need for slave side sorting and how this should be used by applications wanting to use it. If there is a demand for this then i'd like to propose to make this a GSoC project where i volunteer to be a co-mentor. I look forward to your opinions. Best regards, Mark [1] http://mail.kde.org/pipermail/kde-frameworks-devel/2014-May/015782.html [2] http://mail.kde.org/pipermail/kde-frameworks-devel/2014-June/016341.html [3] https://git.reviewboard.kde.org/r/121817/ [4] http://kdeblog.mageprojects.com/2014/07/06/natural-string-sorting-an-in-depth-analysis/
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