Ashley
My small test proves that native export is required even if you make a simple game with no behaviours and only one simple event.
My test contains 5 moving 64x64 squares. The only behaviour they have is "wrap".
APK - it runs 40-45 fps and 8-13% cpu on my mobile device (Apk is made via last version of intel XDK and crosswalk 11)
HTML it runs 58-60 fps and 9-11% cpu on the same mobile device
.CapX
This test proves that Intel XDK kills about 15 fps in a very-very-very simple game.
And now imagine what will happen with complex games.
P.S. Later I can show you the same test built via native apk-export - you will see the difference. It is great.