mirror of
https://github.com/btcsuite/btcd.git
synced 2024-11-20 02:09:04 +01:00
f5cdf2d6a8
This commit contains three classes of optimizations: - Reducing the number of unnecessary hash copies - Improve the performance of the DoubleSha256 function - A couple of minor optimizations of the ShaHash functions The first class is a result of the Bytes function on a ShaHash making a copy of the bytes before returning them. It really should have been named CloneBytes, but that would break the API now. To address this, a comment has been added to the function which explicitly calls out the copy behavior. In addition, all call sites of .Bytes on a ShaHash in the code base have been updated to simply slice the array when a copy is not needed. This saves a significant amount of data copying. The second optimization modifies the DoubleSha256 function to directly use fastsha256.Sum256 instead of the hasher interface. This reduces the number of allocations needed. A benchmark for the function has been added as well. old: BenchmarkDoubleSha256 500000 3691 ns/op 192 B/op 3 allocs/op new: BenchmarkDoubleSha256 500000 3081 ns/op 32 B/op 1 allocs/op The final optimizations are for the ShaHash IsEqual and SetBytes functions which have been modified to make use of the fact the type is an array and remove an unneeded subslice.
412 lines
13 KiB
Go
412 lines
13 KiB
Go
// Copyright (c) 2013-2015 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package wire
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import (
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"bytes"
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"io/ioutil"
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"testing"
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"time"
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)
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// genesisCoinbaseTx is the coinbase transaction for the genesis blocks for
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// the main network, regression test network, and test network (version 3).
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var genesisCoinbaseTx = MsgTx{
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Version: 1,
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TxIn: []*TxIn{
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{
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PreviousOutPoint: OutPoint{
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Hash: ShaHash{},
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Index: 0xffffffff,
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},
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SignatureScript: []byte{
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0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, 0x45, /* |.......E| */
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0x54, 0x68, 0x65, 0x20, 0x54, 0x69, 0x6d, 0x65, /* |The Time| */
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0x73, 0x20, 0x30, 0x33, 0x2f, 0x4a, 0x61, 0x6e, /* |s 03/Jan| */
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0x2f, 0x32, 0x30, 0x30, 0x39, 0x20, 0x43, 0x68, /* |/2009 Ch| */
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0x61, 0x6e, 0x63, 0x65, 0x6c, 0x6c, 0x6f, 0x72, /* |ancellor| */
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0x20, 0x6f, 0x6e, 0x20, 0x62, 0x72, 0x69, 0x6e, /* | on brin| */
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0x6b, 0x20, 0x6f, 0x66, 0x20, 0x73, 0x65, 0x63, /* |k of sec|*/
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0x6f, 0x6e, 0x64, 0x20, 0x62, 0x61, 0x69, 0x6c, /* |ond bail| */
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0x6f, 0x75, 0x74, 0x20, 0x66, 0x6f, 0x72, 0x20, /* |out for |*/
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0x62, 0x61, 0x6e, 0x6b, 0x73, /* |banks| */
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},
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Sequence: 0xffffffff,
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},
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},
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TxOut: []*TxOut{
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{
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Value: 0x12a05f200,
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PkScript: []byte{
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0x41, 0x04, 0x67, 0x8a, 0xfd, 0xb0, 0xfe, 0x55, /* |A.g....U| */
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0x48, 0x27, 0x19, 0x67, 0xf1, 0xa6, 0x71, 0x30, /* |H'.g..q0| */
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0xb7, 0x10, 0x5c, 0xd6, 0xa8, 0x28, 0xe0, 0x39, /* |..\..(.9| */
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0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, /* |..yb...a| */
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0xde, 0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, /* |..I..?L.| */
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0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, /* |8..U....| */
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0x12, 0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, /* |..\8M...| */
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0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, /* |.W.Lp+k.| */
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0x1d, 0x5f, 0xac, /* |._.| */
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},
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},
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},
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LockTime: 0,
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}
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// blockOne is the first block in the mainnet block chain.
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var blockOne = MsgBlock{
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Header: BlockHeader{
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Version: 1,
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PrevBlock: ShaHash([HashSize]byte{ // Make go vet happy.
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0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
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0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
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0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
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0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
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}),
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MerkleRoot: ShaHash([HashSize]byte{ // Make go vet happy.
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0x98, 0x20, 0x51, 0xfd, 0x1e, 0x4b, 0xa7, 0x44,
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0xbb, 0xbe, 0x68, 0x0e, 0x1f, 0xee, 0x14, 0x67,
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0x7b, 0xa1, 0xa3, 0xc3, 0x54, 0x0b, 0xf7, 0xb1,
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0xcd, 0xb6, 0x06, 0xe8, 0x57, 0x23, 0x3e, 0x0e,
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}),
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Timestamp: time.Unix(0x4966bc61, 0), // 2009-01-08 20:54:25 -0600 CST
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Bits: 0x1d00ffff, // 486604799
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Nonce: 0x9962e301, // 2573394689
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},
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Transactions: []*MsgTx{
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{
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Version: 1,
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TxIn: []*TxIn{
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{
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PreviousOutPoint: OutPoint{
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Hash: ShaHash{},
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Index: 0xffffffff,
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},
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SignatureScript: []byte{
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0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04,
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},
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Sequence: 0xffffffff,
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},
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},
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TxOut: []*TxOut{
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{
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Value: 0x12a05f200,
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PkScript: []byte{
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0x41, // OP_DATA_65
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0x04, 0x96, 0xb5, 0x38, 0xe8, 0x53, 0x51, 0x9c,
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0x72, 0x6a, 0x2c, 0x91, 0xe6, 0x1e, 0xc1, 0x16,
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0x00, 0xae, 0x13, 0x90, 0x81, 0x3a, 0x62, 0x7c,
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0x66, 0xfb, 0x8b, 0xe7, 0x94, 0x7b, 0xe6, 0x3c,
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0x52, 0xda, 0x75, 0x89, 0x37, 0x95, 0x15, 0xd4,
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0xe0, 0xa6, 0x04, 0xf8, 0x14, 0x17, 0x81, 0xe6,
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0x22, 0x94, 0x72, 0x11, 0x66, 0xbf, 0x62, 0x1e,
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0x73, 0xa8, 0x2c, 0xbf, 0x23, 0x42, 0xc8, 0x58,
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0xee, // 65-byte signature
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0xac, // OP_CHECKSIG
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},
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},
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},
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LockTime: 0,
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},
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},
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}
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// BenchmarkWriteVarInt1 performs a benchmark on how long it takes to write
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// a single byte variable length integer.
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func BenchmarkWriteVarInt1(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarInt(ioutil.Discard, 0, 1)
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}
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}
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// BenchmarkWriteVarInt3 performs a benchmark on how long it takes to write
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// a three byte variable length integer.
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func BenchmarkWriteVarInt3(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarInt(ioutil.Discard, 0, 65535)
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}
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}
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// BenchmarkWriteVarInt5 performs a benchmark on how long it takes to write
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// a five byte variable length integer.
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func BenchmarkWriteVarInt5(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarInt(ioutil.Discard, 0, 4294967295)
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}
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}
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// BenchmarkWriteVarInt9 performs a benchmark on how long it takes to write
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// a nine byte variable length integer.
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func BenchmarkWriteVarInt9(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarInt(ioutil.Discard, 0, 18446744073709551615)
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}
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}
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// BenchmarkReadVarInt1 performs a benchmark on how long it takes to read
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// a single byte variable length integer.
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func BenchmarkReadVarInt1(b *testing.B) {
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buf := []byte{0x01}
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for i := 0; i < b.N; i++ {
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readVarInt(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkReadVarInt3 performs a benchmark on how long it takes to read
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// a three byte variable length integer.
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func BenchmarkReadVarInt3(b *testing.B) {
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buf := []byte{0x0fd, 0xff, 0xff}
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for i := 0; i < b.N; i++ {
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readVarInt(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkReadVarInt5 performs a benchmark on how long it takes to read
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// a five byte variable length integer.
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func BenchmarkReadVarInt5(b *testing.B) {
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buf := []byte{0xfe, 0xff, 0xff, 0xff, 0xff}
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for i := 0; i < b.N; i++ {
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readVarInt(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkReadVarInt9 performs a benchmark on how long it takes to read
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// a nine byte variable length integer.
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func BenchmarkReadVarInt9(b *testing.B) {
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buf := []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
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for i := 0; i < b.N; i++ {
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readVarInt(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkReadVarStr4 performs a benchmark on how long it takes to read a
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// four byte variable length string.
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func BenchmarkReadVarStr4(b *testing.B) {
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buf := []byte{0x04, 't', 'e', 's', 't'}
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for i := 0; i < b.N; i++ {
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readVarString(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkReadVarStr10 performs a benchmark on how long it takes to read a
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// ten byte variable length string.
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func BenchmarkReadVarStr10(b *testing.B) {
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buf := []byte{0x0a, 't', 'e', 's', 't', '0', '1', '2', '3', '4', '5'}
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for i := 0; i < b.N; i++ {
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readVarString(bytes.NewReader(buf), 0)
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}
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}
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// BenchmarkWriteVarStr4 performs a benchmark on how long it takes to write a
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// four byte variable length string.
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func BenchmarkWriteVarStr4(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarString(ioutil.Discard, 0, "test")
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}
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}
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// BenchmarkWriteVarStr10 performs a benchmark on how long it takes to write a
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// ten byte variable length string.
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func BenchmarkWriteVarStr10(b *testing.B) {
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for i := 0; i < b.N; i++ {
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writeVarString(ioutil.Discard, 0, "test012345")
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}
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}
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// BenchmarkReadOutPoint performs a benchmark on how long it takes to read a
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// transaction output point.
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func BenchmarkReadOutPoint(b *testing.B) {
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buf := []byte{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Previous output hash
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0xff, 0xff, 0xff, 0xff, // Previous output index
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}
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var op OutPoint
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for i := 0; i < b.N; i++ {
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readOutPoint(bytes.NewReader(buf), 0, 0, &op)
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}
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}
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// BenchmarkWriteOutPoint performs a benchmark on how long it takes to write a
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// transaction output point.
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func BenchmarkWriteOutPoint(b *testing.B) {
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op := &OutPoint{
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Hash: ShaHash{},
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Index: 0,
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}
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for i := 0; i < b.N; i++ {
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writeOutPoint(ioutil.Discard, 0, 0, op)
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}
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}
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// BenchmarkReadTxOut performs a benchmark on how long it takes to read a
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// transaction output.
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func BenchmarkReadTxOut(b *testing.B) {
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buf := []byte{
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0x00, 0xf2, 0x05, 0x2a, 0x01, 0x00, 0x00, 0x00, // Transaction amount
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0x43, // Varint for length of pk script
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0x41, // OP_DATA_65
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0x04, 0x96, 0xb5, 0x38, 0xe8, 0x53, 0x51, 0x9c,
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0x72, 0x6a, 0x2c, 0x91, 0xe6, 0x1e, 0xc1, 0x16,
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0x00, 0xae, 0x13, 0x90, 0x81, 0x3a, 0x62, 0x7c,
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0x66, 0xfb, 0x8b, 0xe7, 0x94, 0x7b, 0xe6, 0x3c,
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0x52, 0xda, 0x75, 0x89, 0x37, 0x95, 0x15, 0xd4,
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0xe0, 0xa6, 0x04, 0xf8, 0x14, 0x17, 0x81, 0xe6,
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0x22, 0x94, 0x72, 0x11, 0x66, 0xbf, 0x62, 0x1e,
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0x73, 0xa8, 0x2c, 0xbf, 0x23, 0x42, 0xc8, 0x58,
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0xee, // 65-byte signature
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0xac, // OP_CHECKSIG
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}
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var txOut TxOut
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for i := 0; i < b.N; i++ {
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readTxOut(bytes.NewReader(buf), 0, 0, &txOut)
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}
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}
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// BenchmarkWriteTxOut performs a benchmark on how long it takes to write
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// a transaction output.
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func BenchmarkWriteTxOut(b *testing.B) {
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txOut := blockOne.Transactions[0].TxOut[0]
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for i := 0; i < b.N; i++ {
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writeTxOut(ioutil.Discard, 0, 0, txOut)
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}
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}
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// BenchmarkReadTxIn performs a benchmark on how long it takes to read a
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// transaction input.
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func BenchmarkReadTxIn(b *testing.B) {
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buf := []byte{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Previous output hash
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0xff, 0xff, 0xff, 0xff, // Previous output index
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0x07, // Varint for length of signature script
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0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, // Signature script
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0xff, 0xff, 0xff, 0xff, // Sequence
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}
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var txIn TxIn
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for i := 0; i < b.N; i++ {
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readTxIn(bytes.NewReader(buf), 0, 0, &txIn)
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}
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}
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// BenchmarkWriteTxIn performs a benchmark on how long it takes to write
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// a transaction input.
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func BenchmarkWriteTxIn(b *testing.B) {
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txIn := blockOne.Transactions[0].TxIn[0]
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for i := 0; i < b.N; i++ {
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writeTxIn(ioutil.Discard, 0, 0, txIn)
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}
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}
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// BenchmarkDeserializeTx performs a benchmark on how long it takes to
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// deserialize a transaction.
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func BenchmarkDeserializeTx(b *testing.B) {
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buf := []byte{
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0x01, 0x00, 0x00, 0x00, // Version
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0x01, // Varint for number of input transactions
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // // Previous output hash
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0xff, 0xff, 0xff, 0xff, // Prevous output index
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0x07, // Varint for length of signature script
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0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, // Signature script
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0xff, 0xff, 0xff, 0xff, // Sequence
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0x01, // Varint for number of output transactions
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0x00, 0xf2, 0x05, 0x2a, 0x01, 0x00, 0x00, 0x00, // Transaction amount
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0x43, // Varint for length of pk script
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0x41, // OP_DATA_65
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0x04, 0x96, 0xb5, 0x38, 0xe8, 0x53, 0x51, 0x9c,
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0x72, 0x6a, 0x2c, 0x91, 0xe6, 0x1e, 0xc1, 0x16,
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0x00, 0xae, 0x13, 0x90, 0x81, 0x3a, 0x62, 0x7c,
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0x66, 0xfb, 0x8b, 0xe7, 0x94, 0x7b, 0xe6, 0x3c,
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0x52, 0xda, 0x75, 0x89, 0x37, 0x95, 0x15, 0xd4,
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0xe0, 0xa6, 0x04, 0xf8, 0x14, 0x17, 0x81, 0xe6,
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0x22, 0x94, 0x72, 0x11, 0x66, 0xbf, 0x62, 0x1e,
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0x73, 0xa8, 0x2c, 0xbf, 0x23, 0x42, 0xc8, 0x58,
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0xee, // 65-byte signature
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0xac, // OP_CHECKSIG
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0x00, 0x00, 0x00, 0x00, // Lock time
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}
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var tx MsgTx
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for i := 0; i < b.N; i++ {
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tx.Deserialize(bytes.NewReader(buf))
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}
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}
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// BenchmarkSerializeTx performs a benchmark on how long it takes to serialize
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// a transaction.
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func BenchmarkSerializeTx(b *testing.B) {
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tx := blockOne.Transactions[0]
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for i := 0; i < b.N; i++ {
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tx.Serialize(ioutil.Discard)
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}
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}
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// BenchmarkReadBlockHeader performs a benchmark on how long it takes to
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// deserialize a block header.
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func BenchmarkReadBlockHeader(b *testing.B) {
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buf := []byte{
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0x01, 0x00, 0x00, 0x00, // Version 1
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0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
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0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
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0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
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0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, // PrevBlock
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0x3b, 0xa3, 0xed, 0xfd, 0x7a, 0x7b, 0x12, 0xb2,
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0x7a, 0xc7, 0x2c, 0x3e, 0x67, 0x76, 0x8f, 0x61,
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0x7f, 0xc8, 0x1b, 0xc3, 0x88, 0x8a, 0x51, 0x32,
|
|
0x3a, 0x9f, 0xb8, 0xaa, 0x4b, 0x1e, 0x5e, 0x4a, // MerkleRoot
|
|
0x29, 0xab, 0x5f, 0x49, // Timestamp
|
|
0xff, 0xff, 0x00, 0x1d, // Bits
|
|
0xf3, 0xe0, 0x01, 0x00, // Nonce
|
|
0x00, // TxnCount Varint
|
|
}
|
|
var header BlockHeader
|
|
for i := 0; i < b.N; i++ {
|
|
readBlockHeader(bytes.NewReader(buf), 0, &header)
|
|
}
|
|
}
|
|
|
|
// BenchmarkWriteBlockHeader performs a benchmark on how long it takes to
|
|
// serialize a block header.
|
|
func BenchmarkWriteBlockHeader(b *testing.B) {
|
|
header := blockOne.Header
|
|
for i := 0; i < b.N; i++ {
|
|
writeBlockHeader(ioutil.Discard, 0, &header)
|
|
}
|
|
}
|
|
|
|
// BenchmarkTxSha performs a benchmark on how long it takes to hash a
|
|
// transaction.
|
|
func BenchmarkTxSha(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
genesisCoinbaseTx.TxSha()
|
|
}
|
|
}
|
|
|
|
// BenchmarkDoubleSha256 performs a benchmark on how long it takes to perform a
|
|
// double sha 256.
|
|
func BenchmarkDoubleSha256(b *testing.B) {
|
|
b.StopTimer()
|
|
var buf bytes.Buffer
|
|
if err := genesisCoinbaseTx.Serialize(&buf); err != nil {
|
|
b.Errorf("Serialize: unexpected error: %v", err)
|
|
return
|
|
}
|
|
txBytes := buf.Bytes()
|
|
b.StartTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
_ = DoubleSha256(txBytes)
|
|
}
|
|
}
|