Add benchmarks for readOutPoint.

This commit adds a benchmark for the readOutPoint function.

bench_test.go

@@ -106,13 +106,29 @@ func BenchmarkWriteVarStr4(b *testing.B) {
 }
 
 // BenchmarkWriteVarStr10 performs a benchmark on how long it takes to write a
-// four byte variable length string.
+// ten byte variable length string.
 func BenchmarkWriteVarStr10(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		btcwire.TstWriteVarString(ioutil.Discard, 0, "test012345")
 	}
 }
 
+// BenchmarkReadOutPoint performs a benchmark on how long it takes to read a
+// transaction output point.
+func BenchmarkReadOutPoint(b *testing.B) {
+	buf := []byte{
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Previous output hash
+		0xff, 0xff, 0xff, 0xff, // Previous output index
+	}
+	var op btcwire.OutPoint
+	for i := 0; i < b.N; i++ {
+		btcwire.TstReadOutPoint(bytes.NewBuffer(buf), 0, 0, &op)
+	}
+}
+
 // BenchmarkWriteOutPoint performs a benchmark on how long it takes to write a
 // transaction output point.
 func BenchmarkWriteOutPoint(b *testing.B) {

internal_test.go

@@ -103,6 +103,12 @@ func TstReadMessageHeader(r io.Reader) (*messageHeader, error) {
 	return readMessageHeader(r)
 }
 
+// TstReadOutPoint makes the internal readOutPoint function available to the
+// test package.
+func TstReadOutPoint(r io.Reader, pver uint32, version uint32, op *OutPoint) error {
+	return readOutPoint(r, pver, version, op)
+}
+
 // TstWriteOutPoint makes the internal writeOutPoint function available to the
 // test package.
 func TstWriteOutPoint(w io.Writer, pver uint32, version uint32, op *OutPoint) error {