the release note of 2015 Novembre (QlikView 12) say :
Due to the changes in the QIX engine there are performance differences between QlikView 11.20 and QlikView 12. This is specifically noticeable in Publisher reloads where some tasks are slower and others faster. If you experience an overall performance degrade, Qlik offers a patch that can be downloaded from the Qlik Support Portal homepage.
I just want to know if this issue is corrected,
If yes, in which release
else can you provide us the patch (i don't find it)