99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package snap
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import (
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"crypto/rand"
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"fmt"
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"testing"
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"github.com/ethereum/go-ethereum/crypto"
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"golang.org/x/crypto/sha3"
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)
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func TestHashing(t *testing.T) {
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var bytecodes = make([][]byte, 10)
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for i := 0; i < len(bytecodes); i++ {
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buf := make([]byte, 100)
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rand.Read(buf)
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bytecodes[i] = buf
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}
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var want, got string
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var old = func() {
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hasher := sha3.NewLegacyKeccak256()
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for i := 0; i < len(bytecodes); i++ {
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hasher.Reset()
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hasher.Write(bytecodes[i])
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hash := hasher.Sum(nil)
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got = fmt.Sprintf("%v\n%v", got, hash)
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}
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}
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var new = func() {
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hasher := sha3.NewLegacyKeccak256().(crypto.KeccakState)
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var hash = make([]byte, 32)
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for i := 0; i < len(bytecodes); i++ {
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hasher.Reset()
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hasher.Write(bytecodes[i])
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hasher.Read(hash)
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want = fmt.Sprintf("%v\n%v", want, hash)
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}
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}
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old()
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new()
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if want != got {
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t.Errorf("want\n%v\ngot\n%v\n", want, got)
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}
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}
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func BenchmarkHashing(b *testing.B) {
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var bytecodes = make([][]byte, 10000)
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for i := 0; i < len(bytecodes); i++ {
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buf := make([]byte, 100)
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rand.Read(buf)
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bytecodes[i] = buf
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}
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var old = func() {
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hasher := sha3.NewLegacyKeccak256()
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for i := 0; i < len(bytecodes); i++ {
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hasher.Reset()
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hasher.Write(bytecodes[i])
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hasher.Sum(nil)
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}
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}
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var new = func() {
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hasher := sha3.NewLegacyKeccak256().(crypto.KeccakState)
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var hash = make([]byte, 32)
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for i := 0; i < len(bytecodes); i++ {
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hasher.Reset()
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hasher.Write(bytecodes[i])
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hasher.Read(hash)
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}
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}
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b.Run("old", func(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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old()
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}
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})
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b.Run("new", func(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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new()
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}
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})
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}
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