tests: Add benchmark for Save

src/restic/backend/test/benchmarks.go

@@ -144,3 +144,32 @@ func BackendBenchmarkLoadPartialFileOffset(t *testing.B, s *Suite) {
 
 	}
 }
+
+func BackendBenchmarkSave(t *testing.B, s *Suite) {
+	be := s.open(t)
+	defer s.close(t, be)
+
+	length := 1<<24 + 2123
+	data := test.Random(23, length)
+	id := restic.Hash(data)
+	handle := restic.Handle{Type: restic.DataFile, Name: id.String()}
+
+	rd := bytes.NewReader(data)
+
+	t.SetBytes(int64(length))
+	t.ResetTimer()
+
+	for i := 0; i < t.N; i++ {
+		if _, err := rd.Seek(0, 0); err != nil {
+			t.Fatal(err)
+		}
+
+		if err := be.Save(handle, rd); err != nil {
+			t.Fatal(err)
+		}
+
+		if err := be.Remove(handle); err != nil {
+			t.Fatal(err)
+		}
+	}
+}

src/restic/backend/test/funcs.go

@@ -27,4 +27,5 @@ var benchmarkFunctions = []struct {
 	{"LoadFile", BackendBenchmarkLoadFile},
 	{"LoadPartialFile", BackendBenchmarkLoadPartialFile},
 	{"LoadPartialFileOffset", BackendBenchmarkLoadPartialFileOffset},
+	{"Save", BackendBenchmarkSave},
 }