path: root/core/bench_test.go

// Copyright 2015 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 core

import (
    "crypto/ecdsa"
    "io/ioutil"
    "math/big"
    "os"
    "testing"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/common/math"
    "github.com/ethereum/go-ethereum/consensus/ethash"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/core/vm"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/params"
)

func BenchmarkInsertChain_empty_memdb(b *testing.B) {
    benchInsertChain(b, false, nil)
}
func BenchmarkInsertChain_empty_diskdb(b *testing.B) {
    benchInsertChain(b, true, nil)
}
func BenchmarkInsertChain_valueTx_memdb(b *testing.B) {
    benchInsertChain(b, false, genValueTx(0))
}
func BenchmarkInsertChain_valueTx_diskdb(b *testing.B) {
    benchInsertChain(b, true, genValueTx(0))
}
func BenchmarkInsertChain_valueTx_100kB_memdb(b *testing.B) {
    benchInsertChain(b, false, genValueTx(100*1024))
}
func BenchmarkInsertChain_valueTx_100kB_diskdb(b *testing.B) {
    benchInsertChain(b, true, genValueTx(100*1024))
}
func BenchmarkInsertChain_uncles_memdb(b *testing.B) {
    benchInsertChain(b, false, genUncles)
}
func BenchmarkInsertChain_uncles_diskdb(b *testing.B) {
    benchInsertChain(b, true, genUncles)
}
func BenchmarkInsertChain_ring200_memdb(b *testing.B) {
    benchInsertChain(b, false, genTxRing(200))
}
func BenchmarkInsertChain_ring200_diskdb(b *testing.B) {
    benchInsertChain(b, true, genTxRing(200))
}
func BenchmarkInsertChain_ring1000_memdb(b *testing.B) {
    benchInsertChain(b, false, genTxRing(1000))
}
func BenchmarkInsertChain_ring1000_diskdb(b *testing.B) {
    benchInsertChain(b, true, genTxRing(1000))
}

var (
    // This is the content of the genesis block used by the benchmarks.
    benchRootKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
    benchRootAddr   = crypto.PubkeyToAddress(benchRootKey.PublicKey)
    benchRootFunds  = math.BigPow(2, 100)
)

// genValueTx returns a block generator that includes a single
// value-transfer transaction with n bytes of extra data in each
// block.
func genValueTx(nbytes int) func(int, *BlockGen) {
    return func(i int, gen *BlockGen) {
        toaddr := common.Address{}
        data := make([]byte, nbytes)
        gas := IntrinsicGas(data, false, false)
        tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(benchRootAddr), toaddr, big.NewInt(1), gas, nil, data), types.HomesteadSigner{}, benchRootKey)
        gen.AddTx(tx)
    }
}

var (
    ringKeys  = make([]*ecdsa.PrivateKey, 1000)
    ringAddrs = make([]common.Address, len(ringKeys))
    bigTxGas  = new(big.Int).SetUint64(params.TxGas)
)

func init() {
    ringKeys[0] = benchRootKey
    ringAddrs[0] = benchRootAddr
    for i := 1; i < len(ringKeys); i++ {
        ringKeys[i], _ = crypto.GenerateKey()
        ringAddrs[i] = crypto.PubkeyToAddress(ringKeys[i].PublicKey)
    }
}

// genTxRing returns a block generator that sends ether in a ring
// among n accounts. This is creates n entries in the state database
// and fills the blocks with many small transactions.
func genTxRing(naccounts int) func(int, *BlockGen) {
    from := 0
    return func(i int, gen *BlockGen) {
        gas := CalcGasLimit(gen.PrevBlock(i - 1))
        for {
            gas.Sub(gas, bigTxGas)
            if gas.Cmp(bigTxGas) < 0 {
                break
            }
            to := (from + 1) % naccounts
            tx := types.NewTransaction(
                gen.TxNonce(ringAddrs[from]),
                ringAddrs[to],
                benchRootFunds,
                bigTxGas,
                nil,
                nil,
            )
            tx, _ = types.SignTx(tx, types.HomesteadSigner{}, ringKeys[from])
            gen.AddTx(tx)
            from = to
        }
    }
}

// genUncles generates blocks with two uncle headers.
func genUncles(i int, gen *BlockGen) {
    if i >= 6 {
        b2 := gen.PrevBlock(i - 6).Header()
        b2.Extra = []byte("foo")
        gen.AddUncle(b2)
        b3 := gen.PrevBlock(i - 6).Header()
        b3.Extra = []byte("bar")
        gen.AddUncle(b3)
    }
}

func benchInsertChain(b *testing.B, disk bool, gen func(int, *BlockGen)) {
    // Create the database in memory or in a temporary directory.
    var db ethdb.Database
    if !disk {
        db, _ = ethdb.NewMemDatabase()
    } else {
        dir, err := ioutil.TempDir("", "eth-core-bench")
        if err != nil {
            b.Fatalf("cannot create temporary directory: %v", err)
        }
        defer os.RemoveAll(dir)
        db, err = ethdb.NewLDBDatabase(dir, 128, 128)
        if err != nil {
            b.Fatalf("cannot create temporary database: %v", err)
        }
        defer db.Close()
    }

    // Generate a chain of b.N blocks using the supplied block
    // generator function.
    gspec := Genesis{
        Config: params.TestChainConfig,
        Alloc:  GenesisAlloc{benchRootAddr: {Balance: benchRootFunds}},
    }
    genesis := gspec.MustCommit(db)
    chain, _ := GenerateChain(gspec.Config, genesis, db, b.N, gen)

    // Time the insertion of the new chain.
    // State and blocks are stored in the same DB.
    chainman, _ := NewBlockChain(db, gspec.Config, ethash.NewFaker(), vm.Config{})
    defer chainman.Stop()
    b.ReportAllocs()
    b.ResetTimer()
    if i, err := chainman.InsertChain(chain); err != nil {
        b.Fatalf("insert error (block %d): %v\n", i, err)
    }
}

func BenchmarkChainRead_header_10k(b *testing.B) {
    benchReadChain(b, false, 10000)
}
func BenchmarkChainRead_full_10k(b *testing.B) {
    benchReadChain(b, true, 10000)
}
func BenchmarkChainRead_header_100k(b *testing.B) {
    benchReadChain(b, false, 100000)
}
func BenchmarkChainRead_full_100k(b *testing.B) {
    benchReadChain(b, true, 100000)
}
func BenchmarkChainRead_header_500k(b *testing.B) {
    benchReadChain(b, false, 500000)
}
func BenchmarkChainRead_full_500k(b *testing.B) {
    benchReadChain(b, true, 500000)
}
func BenchmarkChainWrite_header_10k(b *testing.B) {
    benchWriteChain(b, false, 10000)
}
func BenchmarkChainWrite_full_10k(b *testing.B) {
    benchWriteChain(b, true, 10000)
}
func BenchmarkChainWrite_header_100k(b *testing.B) {
    benchWriteChain(b, false, 100000)
}
func BenchmarkChainWrite_full_100k(b *testing.B) {
    benchWriteChain(b, true, 100000)
}
func BenchmarkChainWrite_header_500k(b *testing.B) {
    benchWriteChain(b, false, 500000)
}
func BenchmarkChainWrite_full_500k(b *testing.B) {
    benchWriteChain(b, true, 500000)
}

// makeChainForBench writes a given number of headers or empty blocks/receipts
// into a database.
func makeChainForBench(db ethdb.Database, full bool, count uint64) {
    var hash common.Hash
    for n := uint64(0); n < count; n++ {
        header := &types.Header{
            Coinbase:    common.Address{},
            Number:      big.NewInt(int64(n)),
            ParentHash:  hash,
            Difficulty:  big.NewInt(1),
            UncleHash:   types.EmptyUncleHash,
            TxHash:      types.EmptyRootHash,
            ReceiptHash: types.EmptyRootHash,
        }
        hash = header.Hash()
        WriteHeader(db, header)
        WriteCanonicalHash(db, hash, n)
        WriteTd(db, hash, n, big.NewInt(int64(n+1)))
        if full || n == 0 {
            block := types.NewBlockWithHeader(header)
            WriteBody(db, hash, n, block.Body())
            WriteBlockReceipts(db, hash, n, nil)
        }
    }
}

func benchWriteChain(b *testing.B, full bool, count uint64) {
    for i := 0; i < b.N; i++ {
        dir, err := ioutil.TempDir("", "eth-chain-bench")
        if err != nil {
            b.Fatalf("cannot create temporary directory: %v", err)
        }
        db, err := ethdb.NewLDBDatabase(dir, 128, 1024)
        if err != nil {
            b.Fatalf("error opening database at %v: %v", dir, err)
        }
        makeChainForBench(db, full, count)
        db.Close()
        os.RemoveAll(dir)
    }
}

func benchReadChain(b *testing.B, full bool, count uint64) {
    dir, err := ioutil.TempDir("", "eth-chain-bench")
    if err != nil {
        b.Fatalf("cannot create temporary directory: %v", err)
    }
    defer os.RemoveAll(dir)

    db, err := ethdb.NewLDBDatabase(dir, 128, 1024)
    if err != nil {
        b.Fatalf("error opening database at %v: %v", dir, err)
    }
    makeChainForBench(db, full, count)
    db.Close()

    b.ReportAllocs()
    b.ResetTimer()

    for i := 0; i < b.N; i++ {
        db, err := ethdb.NewLDBDatabase(dir, 128, 1024)
        if err != nil {
            b.Fatalf("error opening database at %v: %v", dir, err)
        }
        chain, err := NewBlockChain(db, params.TestChainConfig, ethash.NewFaker(), vm.Config{})
        if err != nil {
            b.Fatalf("error creating chain: %v", err)
        }

        for n := uint64(0); n < count; n++ {
            header := chain.GetHeaderByNumber(n)
            if full {
                hash := header.Hash()
                GetBody(db, hash, n)
                GetBlockReceipts(db, hash, n)
            }
        }

        chain.Stop()
        db.Close()
    }
}