[#376] object: add benchmarks for attributes marshal/unmarshal

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

object/bench_test.go

@@ -0,0 +1,43 @@
+package object
+
+import (
+	"math/rand"
+	"testing"
+)
+
+func randString(n int) string {
+	x := make([]byte, n)
+	for i := range x {
+		x[i] = byte('a' + rand.Intn('z'-'a'))
+	}
+	return string(x)
+}
+
+func BenchmarkAttributesMarshal(b *testing.B) {
+	attrs := make([]*Attribute, 50)
+	for i := range attrs {
+		attrs[i] = new(Attribute)
+		attrs[i].key = SysAttributePrefix + randString(10)
+		attrs[i].val = randString(10)
+	}
+	raw := AttributesToGRPC(attrs)
+
+	b.Run("marshal", func(b *testing.B) {
+		b.ReportAllocs()
+		for i := 0; i < b.N; i++ {
+			res := AttributesToGRPC(attrs)
+			if len(res) != len(raw) {
+				b.FailNow()
+			}
+		}
+	})
+	b.Run("unmarshal", func(b *testing.B) {
+		b.ReportAllocs()
+		for i := 0; i < b.N; i++ {
+			res, err := AttributesFromGRPC(raw)
+			if err != nil || len(res) != len(raw) {
+				b.FailNow()
+			}
+		}
+	})
+}