[bob1029]

> It sounds like you've delegated if statements to configurable SQL queries, does that mean you need to take the context/variables/code and put it into a temporary SQL db whenever you evaluate them.

This is precisely what we do. The schema of the target database is known at startup time, so we can build a template copy of the database in memory and use this as a starting point to fill in current copies of domain state.

Performance is very good for our requirements. We don't need indexes because the actual amount of data in each database is incredibly small. I have benchmarked 30k SELECT statements per second against this approach, which should be more than enough if you consider that all of this is on a per-user-session basis. We could have hundreds of these in-flight simultaneously without any contention.