I will use a clone of the table to compare it to when search optimisation is on. I will make sure no caching in on which could affect the test.
I activate the feature via:
ALTER TABLE data_staging ADD SEARCH OPTIMIZATION;
This takes time! If you run something like the below to confirm 100% completion. This is because there is a maintenance service that runs in the background responsible for creating and maintaining the search access path:
Click through to see what happens and the kinds of performance gains Arun realized.