Getting data from query result taking a long time

Working with Data
,
16

@Alex_Pickard, here are my findings.

I was able to observe the difference you explained. But I was curious so rather that just
print()
 I did
print( db.tracking_temp.find(query, project).limit(1) )

Not being too familiar with .js, I was surprised that documents were not printed but the following:

DBQuery: test.tracking_temp -> {
	"$and" : [
		{
			"Ships.Number" : NumberLong("621356461827072000")
		},
		{
			"SecondEvent.Code" : "1111"
		}
	]
}

Which is probably some kind of promise that is not executed when you do not do [0] but it is when you do. Said otherwise with [0], you do not execute the query and you do not transfer any document over the wire. Wonderful world of async I guess.