go-ethereum/trie/trienode/node_test.go

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// Copyright 2023 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>
package trienode
import (
"crypto/rand"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
func BenchmarkMerge(b *testing.B) {
b.Run("1K", func(b *testing.B) {
benchmarkMerge(b, 1000)
})
b.Run("10K", func(b *testing.B) {
benchmarkMerge(b, 10_000)
})
}
func benchmarkMerge(b *testing.B, count int) {
x := NewNodeSet(common.Hash{})
y := NewNodeSet(common.Hash{})
addNode := func(s *NodeSet) {
path := make([]byte, 4)
rand.Read(path)
blob := make([]byte, 32)
rand.Read(blob)
hash := crypto.Keccak256Hash(blob)
s.AddNode(path, New(hash, blob))
}
for i := 0; i < count; i++ {
// Random path of 4 nibbles
addNode(x)
addNode(y)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Store set x into a backup
z := NewNodeSet(common.Hash{})
z.Merge(common.Hash{}, x.Nodes)
// Merge y into x
x.Merge(common.Hash{}, y.Nodes)
x = z
}
}