It seems that recently we switched from storing our configuration in a std::map to an unordered_set or something equivalent. Most likely this has some good size and performance characteristics - so we want to keep it that way =)

Unfortunately - it also introduces non-determinism when writing the the instdir/user/registrymodifications.xcu (run an xmllint --format on that before and after a load and exit to see the difference ;-).

This is not ideal =) Luckily writing that is done asynchronously in its own thread - so we can use plenty of CPU there.

It would be great to hack:

configmgr/source/writemodfile.cxx

To tackle this sort of iteration (there are several of these in there):

        for (NodeMap::const_iterator i(node->getMembers().begin());
             i != node->getMembers().end(); ++i)

And to instead have a local function that builds a new sorted vector of the nodes we want to write. Then if ~nothing changes in the config we can see what did change.

Thanks ! =)