improving Java Applet performance

http://www.frostjedi.com/terra/scripts/java.html

When I visit that in Firefox for the first time, there is a very
noticeable delay between the time the page loads and the applet
loads. For a few seconds, the browser seems to actually lock up,
even.

Also, in Internet Explorer 7, I get a "To help protect your security,
Internet Explorer stopped this site from installing an ActiveX control
on your computer. Click here for options..." message. For such a
benign applet, displaying a warning that a lot of users associate with
viruses seems unnecessary (albeit understandable).

Are slow response times and ActiveX warnings in IE7 avoidable or are
they just a cost of doing business in Java?
.

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