Last tested: May 11, 2020
If you run a query, and then run a query with identical SQL, then Looker pulls the results from cache.
If you run two queries at the same time with identical SQL, Looker realizes this and consolidates them into one request to your database. You may notice both queries appear to be "running" in the Looker UI but only one will hit the database.
One common example is if you have the same query on a dashboard but with different visualization types.
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