Lorenzo Blasa 01dc22b1ab Attributes Metadata ...

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

2022-11-10 11:52:28 -08:00

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