fixes issue #425 (#438)

core/collection/ring.go

@@ -21,6 +21,7 @@ func NewRing(n int) *Ring {
 func (r *Ring) Add(v interface{}) {
 	r.lock.Lock()
 	defer r.lock.Unlock()
+
 	r.elements[r.index%len(r.elements)] = v
 	r.index++
 }

core/collection/ring_test.go

@@ -31,17 +31,6 @@ func TestRingMore(t *testing.T) {
 	assert.ElementsMatch(t, []interface{}{6, 7, 8, 9, 10}, elements)
 }
 
-func BenchmarkRingAdd(b *testing.B) {
-	ring := NewRing(500)
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			for i := 0; i < b.N; i++ {
-				ring.Add(i)
-			}
-		}
-	})
-}
-
 func TestRingAdd(t *testing.T) {
 	ring := NewRing(5051)
 	wg := sync.WaitGroup{}
@@ -57,3 +46,14 @@ func TestRingAdd(t *testing.T) {
 	wg.Wait()
 	assert.Equal(t, 5050, len(ring.Take()))
 }
+
+func BenchmarkRingAdd(b *testing.B) {
+	ring := NewRing(500)
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			for i := 0; i < b.N; i++ {
+				ring.Add(i)
+			}
+		}
+	})
+}