How to find out in DataMapper the time during which the SQL server processed my request?

Question

ruby

There is a search on my site. I would like to display the time for which the server processed the search request.
If you enable logging , then in the console I will see what the SQL query was, and the time spent on its execution
DataMapper::Logger.new(STDOUT, :debug)

~ (0.251706) SELECT COUNT(*) FROM "wc_lib_items" WHERE (("id" IN (SELECT "id" FROM "wc_lib_items" ORDER BY "id" LIMIT 0) OR NOT((lower(authors) LIKE '%akatova% ' ESCAPE '|'))) AND "published" <= '2015-04-17T20:26:26+03:00')

In this case it is (0.251706)
How do I get this number from the application?
Do not parse the log)