D24614: Micro optimizations

[Vlad Zahorodnii]

zzag accepted this revision.
zzag added a comment.
This revision is now accepted and ready to land.


  > Add some const & for things that return const & so there's no need to make a copy
  
  For what it's worth, copy elision is guaranteed starting from C++17. \o/

REPOSITORY
  R31 Breeze

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D24614

To: aacid, zzag
Cc: zzag, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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