diff --git a/app/models/User.coffee b/app/models/User.coffee
index 2dcc1dcc6..fcadc0f04 100644
--- a/app/models/User.coffee
+++ b/app/models/User.coffee
@@ -125,6 +125,7 @@ module.exports = class User extends CocoModel
 
   getForeshadowsLevels: ->
     return @foreshadowsLevels if @foreshadowsLevels?
+    return false  # bad performance problems, reenable later
     group = me.get('testGroupNumber') % 16
     @foreshadowsLevels = switch group
       when 0, 1, 2, 3, 4, 5, 6, 7 then true