lbcd/txscript/bench_test.go

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// Copyright (c) 2018-2019 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package txscript
import (
"bytes"
"fmt"
"io/ioutil"
"testing"
"github.com/btcsuite/btcd/wire"
)
var (
// manyInputsBenchTx is a transaction that contains a lot of inputs which is
// useful for benchmarking signature hash calculation.
manyInputsBenchTx wire.MsgTx
// A mock previous output script to use in the signing benchmark.
prevOutScript = hexToBytes("a914f5916158e3e2c4551c1796708db8367207ed13bb87")
)
func init() {
// tx 620f57c92cf05a7f7e7f7d28255d5f7089437bc48e34dcfebf7751d08b7fb8f5
txHex, err := ioutil.ReadFile("data/many_inputs_tx.hex")
if err != nil {
panic(fmt.Sprintf("unable to read benchmark tx file: %v", err))
}
txBytes := hexToBytes(string(txHex))
err = manyInputsBenchTx.Deserialize(bytes.NewReader(txBytes))
if err != nil {
panic(err)
}
}
// BenchmarkCalcSigHash benchmarks how long it takes to calculate the signature
// hashes for all inputs of a transaction with many inputs.
func BenchmarkCalcSigHash(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
for j := 0; j < len(manyInputsBenchTx.TxIn); j++ {
_, err := CalcSignatureHash(prevOutScript, SigHashAll,
&manyInputsBenchTx, j)
if err != nil {
b.Fatalf("failed to calc signature hash: %v", err)
}
}
}
}