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Preallocate the tx serialization buffer.

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Benchmarking shows this is slightly faster due to avoiding the extra
garbage collection in addition to less peak memory usage.

ok @davecgh
This commit is contained in:
David Hill 2014-03-20 15:33:09 -04:00
parent f1a4dfb86d
commit eecea4180a
1 changed files with 2 additions and 2 deletions
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4
rpcwebsocket.go
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@ -549,9 +549,9 @@ func (*wsNotificationManager) removeSpentRequest(ops map[btcwire.OutPoint]map[ch
// txHexString returns the serialized transaction encoded in hexadecimal. // txHexString returns the serialized transaction encoded in hexadecimal.
func txHexString(tx *btcutil.Tx) string { func txHexString(tx *btcutil.Tx) string {
var buf bytes.Buffer buf := bytes.NewBuffer(make([]byte, 0, tx.MsgTx().SerializeSize()))
// Ignore Serialize's error, as writing to a bytes.buffer cannot fail. // Ignore Serialize's error, as writing to a bytes.buffer cannot fail.
tx.MsgTx().Serialize(&buf) tx.MsgTx().Serialize(buf)
return hex.EncodeToString(buf.Bytes()) return hex.EncodeToString(buf.Bytes())
} }