From 2003d543e8c1986230caf84f11466b6222ec1d96 Mon Sep 17 00:00:00 2001 From: lmittmann Date: Tue, 14 Jun 2022 14:09:48 +0200 Subject: [PATCH] all: prefer `new(big.Int)` over `big.NewInt(0)` (#25087) minor performance improvement: `big.NewInt(0).Xxx` -> `new(big.Int).Xxx` --- accounts/abi/unpack.go | 10 ++++------ accounts/abi/unpack_test.go | 2 +- cmd/devp2p/internal/ethtest/chain.go | 4 ++-- cmd/evm/internal/t8ntool/execution.go | 2 +- consensus/ethash/consensus_test.go | 2 +- core/blockchain_test.go | 6 +++--- internal/ethapi/api.go | 2 +- rlp/decode_test.go | 2 +- rlp/encode_test.go | 6 +++--- signer/core/api_test.go | 2 +- signer/fourbyte/validation_test.go | 4 ++-- signer/rules/rules_test.go | 4 ++-- 12 files changed, 22 insertions(+), 24 deletions(-) diff --git a/accounts/abi/unpack.go b/accounts/abi/unpack.go index 43cd6c6457..28c5c82bb3 100644 --- a/accounts/abi/unpack.go +++ b/accounts/abi/unpack.go @@ -255,7 +255,7 @@ func toGoType(index int, t Type, output []byte) (interface{}, error) { // lengthPrefixPointsTo interprets a 32 byte slice as an offset and then determines which indices to look to decode the type. func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err error) { - bigOffsetEnd := big.NewInt(0).SetBytes(output[index : index+32]) + bigOffsetEnd := new(big.Int).SetBytes(output[index : index+32]) bigOffsetEnd.Add(bigOffsetEnd, common.Big32) outputLength := big.NewInt(int64(len(output))) @@ -268,11 +268,9 @@ func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err } offsetEnd := int(bigOffsetEnd.Uint64()) - lengthBig := big.NewInt(0).SetBytes(output[offsetEnd-32 : offsetEnd]) + lengthBig := new(big.Int).SetBytes(output[offsetEnd-32 : offsetEnd]) - totalSize := big.NewInt(0) - totalSize.Add(totalSize, bigOffsetEnd) - totalSize.Add(totalSize, lengthBig) + totalSize := new(big.Int).Add(bigOffsetEnd, lengthBig) if totalSize.BitLen() > 63 { return 0, 0, fmt.Errorf("abi: length larger than int64: %v", totalSize) } @@ -287,7 +285,7 @@ func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err // tuplePointsTo resolves the location reference for dynamic tuple. func tuplePointsTo(index int, output []byte) (start int, err error) { - offset := big.NewInt(0).SetBytes(output[index : index+32]) + offset := new(big.Int).SetBytes(output[index : index+32]) outputLen := big.NewInt(int64(len(output))) if offset.Cmp(outputLen) > 0 { diff --git a/accounts/abi/unpack_test.go b/accounts/abi/unpack_test.go index bf40c301b5..ae3565c71e 100644 --- a/accounts/abi/unpack_test.go +++ b/accounts/abi/unpack_test.go @@ -424,7 +424,7 @@ func TestMultiReturnWithStringArray(t *testing.T) { } buff := new(bytes.Buffer) buff.Write(common.Hex2Bytes("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")) - temp, _ := big.NewInt(0).SetString("30000000000000000000", 10) + temp, _ := new(big.Int).SetString("30000000000000000000", 10) ret1, ret1Exp := new([3]*big.Int), [3]*big.Int{big.NewInt(1545304298), big.NewInt(6), temp} ret2, ret2Exp := new(common.Address), common.HexToAddress("ab1257528b3782fb40d7ed5f72e624b744dffb2f") ret3, ret3Exp := new([2]string), [2]string{"Ethereum", "Hello, Ethereum!"} diff --git a/cmd/devp2p/internal/ethtest/chain.go b/cmd/devp2p/internal/ethtest/chain.go index d0d55a455d..f283154c8c 100644 --- a/cmd/devp2p/internal/ethtest/chain.go +++ b/cmd/devp2p/internal/ethtest/chain.go @@ -48,7 +48,7 @@ func (c *Chain) Len() int { // TD calculates the total difficulty of the chain at the // chain head. func (c *Chain) TD() *big.Int { - sum := big.NewInt(0) + sum := new(big.Int) for _, block := range c.blocks[:c.Len()] { sum.Add(sum, block.Difficulty()) } @@ -58,7 +58,7 @@ func (c *Chain) TD() *big.Int { // TotalDifficultyAt calculates the total difficulty of the chain // at the given block height. func (c *Chain) TotalDifficultyAt(height int) *big.Int { - sum := big.NewInt(0) + sum := new(big.Int) if height >= c.Len() { return sum } diff --git a/cmd/evm/internal/t8ntool/execution.go b/cmd/evm/internal/t8ntool/execution.go index 9eaead3878..56d6a9b5ff 100644 --- a/cmd/evm/internal/t8ntool/execution.go +++ b/cmd/evm/internal/t8ntool/execution.go @@ -241,7 +241,7 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig, minerReward.Add(minerReward, perOmmer) // Add (8-delta)/8 reward := big.NewInt(8) - reward.Sub(reward, big.NewInt(0).SetUint64(ommer.Delta)) + reward.Sub(reward, new(big.Int).SetUint64(ommer.Delta)) reward.Mul(reward, blockReward) reward.Div(reward, big.NewInt(8)) statedb.AddBalance(ommer.Address, reward) diff --git a/consensus/ethash/consensus_test.go b/consensus/ethash/consensus_test.go index 6f6dc79fd8..fb7f5f8183 100644 --- a/consensus/ethash/consensus_test.go +++ b/consensus/ethash/consensus_test.go @@ -103,7 +103,7 @@ func TestDifficultyCalculators(t *testing.T) { for i := 0; i < 5000; i++ { // 1 to 300 seconds diff var timeDelta = uint64(1 + rand.Uint32()%3000) - diffBig := big.NewInt(0).SetBytes(randSlice(2, 10)) + diffBig := new(big.Int).SetBytes(randSlice(2, 10)) if diffBig.Cmp(params.MinimumDifficulty) < 0 { diffBig.Set(params.MinimumDifficulty) } diff --git a/core/blockchain_test.go b/core/blockchain_test.go index e0e6f9e03c..c5cdfa78a3 100644 --- a/core/blockchain_test.go +++ b/core/blockchain_test.go @@ -2898,7 +2898,7 @@ func BenchmarkBlockChain_1x1000ValueTransferToNonexisting(b *testing.B) { numBlocks = 1 ) recipientFn := func(nonce uint64) common.Address { - return common.BigToAddress(big.NewInt(0).SetUint64(1337 + nonce)) + return common.BigToAddress(new(big.Int).SetUint64(1337 + nonce)) } dataFn := func(nonce uint64) []byte { return nil @@ -2915,7 +2915,7 @@ func BenchmarkBlockChain_1x1000ValueTransferToExisting(b *testing.B) { b.ResetTimer() recipientFn := func(nonce uint64) common.Address { - return common.BigToAddress(big.NewInt(0).SetUint64(1337)) + return common.BigToAddress(new(big.Int).SetUint64(1337)) } dataFn := func(nonce uint64) []byte { return nil @@ -2932,7 +2932,7 @@ func BenchmarkBlockChain_1x1000Executions(b *testing.B) { b.ResetTimer() recipientFn := func(nonce uint64) common.Address { - return common.BigToAddress(big.NewInt(0).SetUint64(0xc0de)) + return common.BigToAddress(new(big.Int).SetUint64(0xc0de)) } dataFn := func(nonce uint64) []byte { return nil diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go index d7c01be1f6..704ee37810 100644 --- a/internal/ethapi/api.go +++ b/internal/ethapi/api.go @@ -1511,7 +1511,7 @@ type RPCTransaction struct { // newRPCTransaction returns a transaction that will serialize to the RPC // representation, with the given location metadata set (if available). func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber uint64, index uint64, baseFee *big.Int, config *params.ChainConfig) *RPCTransaction { - signer := types.MakeSigner(config, big.NewInt(0).SetUint64(blockNumber)) + signer := types.MakeSigner(config, new(big.Int).SetUint64(blockNumber)) from, _ := types.Sender(signer, tx) v, r, s := tx.RawSignatureValues() result := &RPCTransaction{ diff --git a/rlp/decode_test.go b/rlp/decode_test.go index babdf3891b..192c0aa50c 100644 --- a/rlp/decode_test.go +++ b/rlp/decode_test.go @@ -452,7 +452,7 @@ type ignoredField struct { var ( veryBigInt = new(big.Int).Add( - big.NewInt(0).Lsh(big.NewInt(0xFFFFFFFFFFFFFF), 16), + new(big.Int).Lsh(big.NewInt(0xFFFFFFFFFFFFFF), 16), big.NewInt(0xFFFF), ) veryVeryBigInt = new(big.Int).Exp(veryBigInt, big.NewInt(8), nil) diff --git a/rlp/encode_test.go b/rlp/encode_test.go index 1d715e3776..df02add992 100644 --- a/rlp/encode_test.go +++ b/rlp/encode_test.go @@ -120,15 +120,15 @@ var encTests = []encTest{ {val: big.NewInt(0xFFFFFFFFFFFF), output: "86FFFFFFFFFFFF"}, {val: big.NewInt(0xFFFFFFFFFFFFFF), output: "87FFFFFFFFFFFFFF"}, { - val: big.NewInt(0).SetBytes(unhex("102030405060708090A0B0C0D0E0F2")), + val: new(big.Int).SetBytes(unhex("102030405060708090A0B0C0D0E0F2")), output: "8F102030405060708090A0B0C0D0E0F2", }, { - val: big.NewInt(0).SetBytes(unhex("0100020003000400050006000700080009000A000B000C000D000E01")), + val: new(big.Int).SetBytes(unhex("0100020003000400050006000700080009000A000B000C000D000E01")), output: "9C0100020003000400050006000700080009000A000B000C000D000E01", }, { - val: big.NewInt(0).SetBytes(unhex("010000000000000000000000000000000000000000000000000000000000000000")), + val: new(big.Int).SetBytes(unhex("010000000000000000000000000000000000000000000000000000000000000000")), output: "A1010000000000000000000000000000000000000000000000000000000000000000", }, { diff --git a/signer/core/api_test.go b/signer/core/api_test.go index 9f44ca3195..990c4bc03d 100644 --- a/signer/core/api_test.go +++ b/signer/core/api_test.go @@ -63,7 +63,7 @@ func (ui *headlessUi) ApproveTx(request *core.SignTxRequest) (core.SignTxRespons case "M": // modify // The headless UI always modifies the transaction old := big.Int(request.Transaction.Value) - newVal := big.NewInt(0).Add(&old, big.NewInt(1)) + newVal := new(big.Int).Add(&old, big.NewInt(1)) request.Transaction.Value = hexutil.Big(*newVal) return core.SignTxResponse{request.Transaction, true}, nil default: diff --git a/signer/fourbyte/validation_test.go b/signer/fourbyte/validation_test.go index c3085696f4..2e6d9f2d9b 100644 --- a/signer/fourbyte/validation_test.go +++ b/signer/fourbyte/validation_test.go @@ -29,11 +29,11 @@ func mixAddr(a string) (*common.MixedcaseAddress, error) { return common.NewMixedcaseAddressFromString(a) } func toHexBig(h string) hexutil.Big { - b := big.NewInt(0).SetBytes(common.FromHex(h)) + b := new(big.Int).SetBytes(common.FromHex(h)) return hexutil.Big(*b) } func toHexUint(h string) hexutil.Uint64 { - b := big.NewInt(0).SetBytes(common.FromHex(h)) + b := new(big.Int).SetBytes(common.FromHex(h)) return hexutil.Uint64(b.Uint64()) } func dummyTxArgs(t txtestcase) *apitypes.SendTxArgs { diff --git a/signer/rules/rules_test.go b/signer/rules/rules_test.go index 0ab246eeaf..af4ed2d7e1 100644 --- a/signer/rules/rules_test.go +++ b/signer/rules/rules_test.go @@ -449,7 +449,7 @@ func dummyTx(value hexutil.Big) *core.SignTxRequest { } func dummyTxWithV(value uint64) *core.SignTxRequest { - v := big.NewInt(0).SetUint64(value) + v := new(big.Int).SetUint64(value) h := hexutil.Big(*v) return dummyTx(h) } @@ -469,7 +469,7 @@ func TestLimitWindow(t *testing.T) { return } // 0.3 ether: 429D069189E0000 wei - v := big.NewInt(0).SetBytes(common.Hex2Bytes("0429D069189E0000")) + v := new(big.Int).SetBytes(common.Hex2Bytes("0429D069189E0000")) h := hexutil.Big(*v) // The first three should succeed for i := 0; i < 3; i++ {