[OpenMap Users] Openmap Servlet Performance

I have a servlet I've written using OpenMap and I'm wondering about
enhancing its performance.

Currently it works by re-generating everything for every request. I was
thinking about caching the map to enhance performance, but I'm wondering if
this would help much (especially at the high memory costs involved).

Has anyone done this? I only have to regenerate if something has changed
because I use the browser's caching if nothing changes (I use a version # in
the url). If things have changed anyway (projection, adding layers, etc.)
how much would it help to keep the map around on the server?

Thanks for any advice/info.

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