Assignment deduplication

Each invocation of the get*Assignment methods triggers the logging callback function. If you have connected it to transmit events to your Data Warehouse this will store duplicate data and increase associated costs unnecessarily.

Eppo's SDK deduplicates assignment events using an internal cache that takes into account changes in subject variations and other factors to ensure one and only one canonical event is transmitted.

Since your client likely only handles a single subject, memory pressure should not be a concern and the cache attempts to store all flags for the subject; our goal is to completely eliminate duplicate events.

This behavior is enabled by default and no action is required beyond upgrading to the supported version.

Supported SDKs

This functionality is available in the Javascript, and React Native, and NodeJS clients.