Caching compiled scripts in Google App Engine

[Bediako]

I am looking to cache compiled scripts in Google App Engine. App Engine does some interesting things in the cloud. For local environments it is enough to stick the compiled script into a static hash, however in Google App Engine there is no guarantee that the class will stay loaded over time. As such I am getting poor hit ratios for compiled scripts stored in this way.

I tried to store the compiled script in memcache, but I run into an issue on retrieval from memcache in that the generated class used to represent that compiled script is not found by Google App Engine class loader.

I believe I can get good performance is I was able to cache the compile bytes that represent the AST created by the interpreter in memcache, then somehow construct a Script implementing object from that information.

My question is, is this feasible, can I expect a performance improvement with this method, or is there another approach I could try instead?

Thanks again for all your hard work on Rhino. It is truely a great piece of software!