keychain: add basic benchmark for privkey derivation

keychain/bench_test.go

@@ -0,0 +1,41 @@
+package keychain
+
+import (
+	"testing"
+
+	"github.com/btcsuite/btcd/btcec"
+	"github.com/stretchr/testify/require"
+)
+
+func BenchmarkDerivePrivKey(t *testing.B) {
+	cleanUp, wallet, err := createTestBtcWallet(
+		CoinTypeBitcoin,
+	)
+	if err != nil {
+		t.Fatalf("unable to create wallet: %v", err)
+	}
+
+	keyRing := NewBtcWalletKeyRing(wallet, CoinTypeBitcoin)
+
+	defer cleanUp()
+
+	var (
+		privKey *btcec.PrivateKey
+	)
+
+	keyDesc := KeyDescriptor{
+		KeyLocator: KeyLocator{
+			Family: KeyFamilyMultiSig,
+			Index:  1,
+		},
+	}
+
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	for i := 0; i < t.N; i++ {
+		privKey, err = keyRing.DerivePrivKey(keyDesc)
+	}
+	require.NoError(t, err)
+	require.NotNil(t, privKey)
+}