Reuse gob.Encoder and Decoder in DeepCopy

pkg/conversion/deep_copy_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package conversion
 
 import (
+	"math/rand"
 	"reflect"
 	"testing"
 
@@ -106,3 +107,37 @@ func TestDeepCopyPointerSeparate(t *testing.T) {
 		t.Errorf("deep copy wasn't deep: %#q %#q", x, y)
 	}
 }
+
+var result interface{}
+
+func BenchmarkDeepCopy(b *testing.B) {
+	table := []interface{}{
+		map[string]string{},
+		int(5),
+		"hello world",
+		struct {
+			A, B, C struct {
+				D map[string]int
+			}
+			X []int
+			Y []byte
+		}{},
+	}
+
+	f := fuzz.New().RandSource(rand.NewSource(1)).NilChance(.5).NumElements(0, 100)
+	for i := range table {
+		out := table[i]
+		obj := reflect.New(reflect.TypeOf(out)).Interface()
+		f.Fuzz(obj)
+		table[i] = obj
+	}
+
+	b.ResetTimer()
+	var r interface{}
+	for i := 0; i < b.N; i++ {
+		for j := range table {
+			r, _ = DeepCopy(table[j])
+		}
+	}
+	result = r
+}