How ES handles the query when we don't set _type field?

Is there any performance difference between these queries?
http://pastebin.com/Wu5VPhhJ
http://pastebin.com/2Ket4hHN
I wonder whether Elasticsearch performs same query in each type when we
don't set _type field or makes some performance boosting hacks.

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BTW, I have only 3 types in the index.

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