a7f53bc512
There is no real reason to have nodes storing heap-allocated name and description. Doing this increases amount of allocations during dependency graph building, which usually means somewhat slowness. We're temporarily loosing some eyecandy in the graphviz visualizer, but those we can bring back as a part of graphiz dump (which happens much less often than depsgraph build). This will happen in multiple commits for the ease of bisect in the future just in case this causes any regression. This commit contains ID creation API changes.