How to use genReport with a list of reports

dbmuse

I have a report that I need to generate multiple time with different parameters.
I am able to do this using the runtime and genreport by making a command file repeated call the genreport with different parms...
however this looks very inefficient. I think Java has to start and the engine and generate the report then shutdown... only to do it again and again.

So is there a next step in complexity where I could provide a list and start a genreport2 that would only startup once, go through the list then shutdown?

I'm not a java programmer so looking for a simpliest example of how to get to this functionality.

thanks
Larry