Comment 1 for bug 656031

Robert has another idea:

On feature flags... I'd suggest an xmlrpc/API for evaluating flags.

evaluating flags requires DB access for group membership of a user and
potentially other things like time limited trials, access to opt-in
features and so forth.

The exact API would need to take a user, possibly feature names, and
return a list of the rules whose scopes need to be locally resolved.

Whether this is json or not is immaterial to me - at least for this
patch, the feature evaluating code would load once.

It would be very interesting to do this though, because we could phase
this in per-user.