D9790: Fix slowdown issue

[Albert Astals Cid]

aacid accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R393 KBreakout

REVISION DETAIL
  https://phabricator.kde.org/D9790

To: helfferich, #kde_games, aacid
Cc: aacid, schwarzer, #kde_games
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