D15291: [Folder View] Compare UDS entry times directly instead of going through KFileItem

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, hein.
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REVISION SUMMARY
  This avoids creating a QDateTime object with all the timezone processing that comes with it since we're only interested in the relative order, not absolute precise date time values.
  
  CHANGELOG: Sorting files by date in Folder View is significantly faster now

TEST PLAN
  Having my Downloads ordner as FV sorted ascending by date went from 60ms to under 1ms
  Files still appear sorted correctly
  Did the same change in Dolphin a while back

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D15291

AFFECTED FILES
  containments/desktop/plugins/folder/foldermodel.cpp

To: broulik, #plasma, hein
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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