Sorry, s/session/request/g; corrected above. One example is a multistep transaction processing request. The feature flag could gate several branch points. A m

Sorry, s/session/request/g; corrected above. One example is a multistep transaction processing request. The feature flag could gate several branch points. A memory-mapped SQLite file is great too, but the strategy I describe above is less code to write, adds no new dependencies, is quicker to implement, avoids the SQLite file distribution/availability issues, and should get you a very similar performance improvement.