Function BenchmarkLocationPredicate

pkg/search/query_test.go:2158–2233

BenchmarkLocationPredicate aims at measuring the impact of https://camlistore-review.googlesource.com/8049 ( + https://camlistore-review.googlesource.com/8649) on location queries. It populates the corpus with enough fake foursquare checkins/venues and twitter locations to look realistic.

(b *testing.B)

// It populates the corpus with enough fake foursquare checkins/venues and
// twitter locations to look realistic.
func BenchmarkLocationPredicate(b *testing.B) {
	b.ReportAllocs()
	testQueryTypes(b, corpusTypeOnly, func(qt *queryTest) {
		id := qt.id

		var n int
		newPn := func() blob.Ref {
			n++
			return id.NewPlannedPermanode(fmt.Sprint(n))
		}

		// create (~700) venues all over the world, and mark 25% of them as places we've been to
		venueIdx := 0
		for long := -180.0; long < 180.0; long += 10.0 {
			for lat := -90.0; lat < 90.0; lat += 10.0 {
				pn := newPn()
				id.SetAttribute(pn, "camliNodeType", "foursquare.com:venue")
				id.SetAttribute(pn, "latitude", fmt.Sprintf("%f", lat))
				id.SetAttribute(pn, "longitude", fmt.Sprintf("%f", long))
				if venueIdx%4 == 0 {
					qn := newPn()
					id.SetAttribute(qn, "camliNodeType", "foursquare.com:checkin")
					id.SetAttribute(qn, "foursquareVenuePermanode", pn.String())
				}
				venueIdx++
			}
		}

		// create 3K tweets, all with locations
		lat := 45.18
		long := 5.72
		for i := 0; i < 3000; i++ {
			pn := newPn()
			id.SetAttribute(pn, "camliNodeType", "twitter.com:tweet")
			id.SetAttribute(pn, "latitude", fmt.Sprintf("%f", lat))
			id.SetAttribute(pn, "longitude", fmt.Sprintf("%f", long))
			lat += 0.01
			long += 0.01
		}

		// create 5K additional permanodes, but no location. Just as "noise".
		for i := 0; i < 5000; i++ {
			newPn()
		}

		// Create ~2600 photos all over the world.
		for long := -180.0; long < 180.0; long += 5.0 {
			for lat := -90.0; lat < 90.0; lat += 5.0 {
				br, _ := id.UploadFile("photo.jpg", exifFileContentLatLong(lat, long), time.Time{})
				pn := newPn()
				id.SetAttribute(pn, "camliContent", br.String())
			}
		}

		h := qt.Handler()
		b.ResetTimer()

		locations := []string{