Summary:
Before this change, attributes and attribute metadata were intermingled and sent as one unit via subtree update event.
This represented a few issues:
- Repetitiveness. For each declared and dynamic attribute, metadata was included on each value unit.
- Metadata can vary in size and thus can have a negative impact on payload size.
- The attribute name which is part of metadata is a string which always overhead on processing.
- Metadata instantiation is not cheap thus this also incurs in processing overhead i.e. even instantiating a single string can have an impact.
The proposal is to separate metadata of attributes from the actual node reported attributes. This solves the problems mentioned above.
Reviewed By: LukeDefeo
Differential Revision: D40674156
fbshipit-source-id: 0788551849fbce53065f819ba503e7e4afc03cc0
01dc22b1ab