ES FILTERED QUERY filers first with terms (cheap) and then match(expensive), or otherwise?

[Gabriel Gavilan gavilán]

So I suppose that when I run a filtered query like this one, ES filters all 
the documents in the database, and then performs the match query only to 
the documents that fit the filter, right? I just want to make sure that it 
doesn't perform the match query on all the documents and the drop the ones 
that don't fit the filter, because that would be a total waste of resources 
as I'm only interested on a small portion of the documents.

{
  "query" : {
    "filtered" : {
      "query": {
        "match": {
          "field1": "whatever"
        }
      },
      "filter" : {
        "term" : {
          "field2" : 10
        }
      }
    } 
  }
}

Thanks for clarifying this!

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