as I understand, a preprocessor is started as sub-process by RDZ. For preprocessors written in Java, this requires each time a start of a Java virtual machine.
RDZ itself is a Java program. Is it possible to have the preprocessor being executed in RDZ's VM?
If that does not work I'm thinking of implementing the preprocessor as little (and fast starting) C program that delegates over the network to a standing server process written in Java.