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Optimize readTxIn.

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Before: BenchmarkReadTxIn        1000000              2435 ns/op
After:  BenchmarkReadTxIn        1000000              1427 ns/op

This is part of the ongoing effort to optimize serialization as noted in
conformal/btcd#27.
This commit is contained in:
Dave Collins 2013-11-06 16:18:15 -06:00
parent 1fe9f9e165
commit 59da692131
1 changed files with 6 additions and 4 deletions
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10
msgtx.go
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@ -451,7 +451,7 @@ func writeOutPoint(w io.Writer, pver uint32, version uint32, op *OutPoint) error
// readTxIn reads the next sequence of bytes from r as a transaction input // readTxIn reads the next sequence of bytes from r as a transaction input
// (TxIn). // (TxIn).
func readTxIn(r io.Reader, pver uint32, version uint32, ti *TxIn) error { func readTxIn(r io.Reader, pver uint32, version uint32, ti *TxIn) error {
op := OutPoint{} var op OutPoint
err := readOutPoint(r, pver, version, &op) err := readOutPoint(r, pver, version, &op)
if err != nil { if err != nil {
return err return err
@ -474,16 +474,18 @@ func readTxIn(r io.Reader, pver uint32, version uint32, ti *TxIn) error {
} }
b := make([]byte, count) b := make([]byte, count)
err = readElement(r, b) _, err = io.ReadFull(r, b)
if err != nil { if err != nil {
return err return err
} }
ti.SignatureScript = b ti.SignatureScript = b
err = readElement(r, &ti.Sequence) b = make([]byte, 4)
_, err = io.ReadFull(r, b)
if err != nil { if err != nil {
return err return err
} }
ti.Sequence = binary.LittleEndian.Uint32(b)
return nil return nil
} }
@ -521,10 +523,10 @@ func writeTxIn(w io.Writer, pver uint32, version uint32, ti *TxIn) error {
func readTxOut(r io.Reader, pver uint32, version uint32, to *TxOut) error { func readTxOut(r io.Reader, pver uint32, version uint32, to *TxOut) error {
buf := make([]byte, 8) buf := make([]byte, 8)
_, err := io.ReadFull(r, buf) _, err := io.ReadFull(r, buf)
to.Value = int64(binary.LittleEndian.Uint64(buf))
if err != nil { if err != nil {
return err return err
} }
to.Value = int64(binary.LittleEndian.Uint64(buf))
count, err := readVarInt(r, pver) count, err := readVarInt(r, pver)
if err != nil { if err != nil {