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Optimize writeTxOut.

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Before: BenchmarkWriteTxOut       500000              4050 ns/op
After:  BenchmarkWriteTxOut     10000000               248 ns/op

This is part ef the ongoing effort to optimize serialization as noted in
conformal/btcd#27.
This commit is contained in:
Dave Collins 2013-11-06 15:29:39 -06:00
parent ab8c8e2d39
commit a7e3ee6aeb
1 changed files with 4 additions and 2 deletions
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6
msgtx.go
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@ -552,7 +552,9 @@ func readTxOut(r io.Reader, pver uint32, version uint32, to *TxOut) error {
// writeTxOut encodes to into the bitcoin protocol encoding for a transaction // writeTxOut encodes to into the bitcoin protocol encoding for a transaction
// output (TxOut) to w. // output (TxOut) to w.
func writeTxOut(w io.Writer, pver uint32, version uint32, to *TxOut) error { func writeTxOut(w io.Writer, pver uint32, version uint32, to *TxOut) error {
err := writeElement(w, to.Value) buf := make([]byte, 8)
binary.LittleEndian.PutUint64(buf, uint64(to.Value))
_, err := w.Write(buf)
if err != nil { if err != nil {
return err return err
} }
@ -563,7 +565,7 @@ func writeTxOut(w io.Writer, pver uint32, version uint32, to *TxOut) error {
return err return err
} }
err = writeElement(w, to.PkScript) _, err = w.Write(to.PkScript)
if err != nil { if err != nil {
return err return err
} }