var (
			data      = make([]byte, size)
			plaintext = bytes.NewReader(data)
			context   = kms.Context{"key": "value"}
		)
		b.SetBytes(int64(size))
		for i := 0; i < b.N; i++ {
			ciphertext, err := Encrypt(KMS, plaintext, context)
			if err != nil {
				b.Fatal(err)
			}
			if _, err = io.Copy(io.Discard, ciphertext); err != nil {
				b.Fatal(err)
			}
			plaintext.Reset(data)
		}
	}