improve performance loading WD4A app "in NWP"

Hi,

In our Portal (EP6 SPS16) several iViews run, which call Web Dynpro for ABAP apps on a different WAS7-server.

When clicking on an iView it takes 'some' time before the apps show.

There are several options to tweak the performance (or influence the user-perception of performance):

- improve the WD4A app, so it loads faster

- show a message "loading app"

- use browser caching (iView)

Are there other ways to improve the performance? Is it possible to cache the WD4A on the WAS-server?

Best regards,

Mark