1 files changed, 13 insertions, 0 deletions
diff --git a/libgo/go/container/heap/heap_test.go b/libgo/go/container/heap/heap_test.go
index cb31ef6d30a..73f33e8d2cf 100644
--- a/libgo/go/container/heap/heap_test.go
+++ b/libgo/go/container/heap/heap_test.go
@@ -170,3 +170,16 @@ func TestRemove2(t *testing.T) {
 		}
 	}
 }
+
+func BenchmarkDup(b *testing.B) {
+	const n = 10000
+	h := make(myHeap, n)
+	for i := 0; i < b.N; i++ {
+		for j := 0; j < n; j++ {
+			Push(&h, 0) // all elements are the same
+		}
+		for h.Len() > 0 {
+			Pop(&h)
+		}
+	}
+}