It seems, that only IE has this issue, other browsers (Firefox oder Chrome) are displaying the page in approximatly the same time as IE without Scriptscan.
What can we do to make the page load faster? Is there a way to change or "signate" the script, so that ScriptScan works faster?
I have a few exceptions to my script scan policy to white list certain webpages, i.e. company site .com, intranet site.com sub site. intranet site.com
that solved my issues at least!