// SPDX-License-Identifier: MIT
pragma solidity 0.8.13; // optimize 200
/**
* @title AbiEncodeVsEPacked
* @author IllIllI
*/
contract AbiEncodeVsEPacked {
function test(uint256 x) external view returns (bytes32) {
return keccak256(
abi.encode(msg.sender, x, block.timestamp));
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13; // optimize 200
/**
* @title AbiEncodeVsEPacked
* @author IllIllI
*/
contract AbiEncodeVsEPacked {
function test(uint256 x) external view returns (bytes32) {
return keccak256(
abi.encodePacked(msg.sender, x, block.timestamp));
}
}
diff --git a/AbiEncodeVsEPacked_e.sol b/AbiEncodeVsEPacked_p.sol
index 74cf9a7..4784efc 100644
--- a/AbiEncodeVsEPacked_e.sol
+++ b/AbiEncodeVsEPacked_p.sol
@@ -8,7 +8,7 @@ pragma solidity 0.8.13; // optimize 200
contract AbiEncodeVsEPacked {
function test(uint256 x) external view returns (bytes32) {
return keccak256(
- abi.encode(msg.sender, x, block.timestamp));
+ abi.encodePacked(msg.sender, x, block.timestamp));
}
}
$ solc AbiEncodeVsEPacked_e.sol --bin --optimize --optimize-runs 200 | egrep "^60[0-9]+"
608060405234801561001057600080fd5b5060d18061001f6000396000f3fe6080604052348015600f57600080fd5b506004361060285760003560e01c806329e99f0714602d575b600080fd5b607160383660046083565b60408051336020820152908101829052426060820152600090608001604051602081830303815290604052805190602001209050919050565b60405190815260200160405180910390f35b600060208284031215609457600080fd5b503591905056fea2646970667358221220d58dc3743d9dd1d55aebe82d595ae50ff14388a83e158a2f3946abf9c9fec00664736f6c634300080d0033
$ solc AbiEncodeVsEPacked_p.sol --bin --optimize --optimize-runs 200 | egrep "^60[0-9]+"
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
| PC.Enc | Operation.Enc | Gas.Enc | PC.Pkd | Operation.Pkd | Gas.Pkd |
|---|---|---|---|---|---|
| 87(0x57) | JUMPDEST(0x5b)@0x57 | 1 | 87(0x57) | JUMPDEST(0x5b)@0x57 | 1 |
| 88(0x58) | PUSH1(0x60) ["0x40"] | 3 | 88(0x58) | PUSH1(0x60) ["0x40"] | 3 |
| 90(0x5a) | DUP1(0x80) | 3 | |||
| 91(0x5b) | MLOAD(0x51) | 3 | 90(0x5a) | MLOAD(0x51) | 3 |
| 91(0x5b) | PUSH12(0x6b) ["0xff","0xff",... | 3 | |||
| 104(0x68) | NOT(0x19) | 3 | |||
| 92(0x5c) | CALLER(0x33) | 2 | 105(0x69) | CALLER(0x33) | 2 |
| 93(0x5d) | PUSH1(0x60) ["0x20"] | 3 | 106(0x6a) | PUSH1(0x60) ["0x60"] | 3 |
| 108(0x6c) | SHL(0x1b) | 3 | |||
| 109(0x6d) | AND(0x16) | 3 | |||
| 110(0x6e) | PUSH1(0x60) ["0x20"] | 3 | |||
| 95(0x5f) | DUP3(0x82) | 3 | 112(0x70) | DUP3(0x82) | 3 |
| 96(0x60) | ADD(0x1) | 3 | 113(0x71) | ADD(0x1) | 3 |
| 97(0x61) | MSTORE(0x52) | 3 | 114(0x72) | MSTORE(0x52) | 3 |
| 115(0x73) | PUSH1(0x60) ["0x34"] | 3 | |||
| 98(0x62) | SWAP1(0x90) | 3 | |||
| 99(0x63) | DUP2(0x81) | 3 | 117(0x75) | DUP2(0x81) | 3 |
| 100(0x64) | ADD(0x1) | 3 | 118(0x76) | ADD(0x1) | 3 |
| 101(0x65) | DUP3(0x82) | 3 | 119(0x77) | DUP3(0x82) | 3 |
| 102(0x66) | SWAP1(0x90) | 3 | 120(0x78) | SWAP1(0x90) | 3 |
| 103(0x67) | MSTORE(0x52) | 3 | 121(0x79) | MSTORE(0x52) | 3 |
| 104(0x68) | TIMESTAMP(0x42) | 2 | 122(0x7a) | TIMESTAMP(0x42) | 2 |
| 105(0x69) | PUSH1(0x60) ["0x60"] | 3 | 123(0x7b) | PUSH1(0x60) ["0x54"] | 3 |
| 107(0x6b) | DUP3(0x82) | 3 | 125(0x7d) | DUP3(0x82) | 3 |
| 108(0x6c) | ADD(0x1) | 3 | 126(0x7e) | ADD(0x1) | 3 |
| 109(0x6d) | MSTORE(0x52) | 3 | 127(0x7f) | MSTORE(0x52) | 3 |
| 110(0x6e) | PUSH1(0x60) ["0x00"] | 3 | 128(0x80) | PUSH1(0x60) ["0x00"] | 3 |
| 112(0x70) | SWAP1(0x90) | 3 | 130(0x82) | SWAP1(0x90) | 3 |
| 113(0x71) | PUSH1(0x60) ["0x80"] | 3 | 131(0x83) | PUSH1(0x60) ["0x74"] | 3 |
| 115(0x73) | ADD(0x1) | 3 | 133(0x85) | ADD(0x1) | 3 |
| 116(0x74) | PUSH1(0x60) ["0x40"] | 3 | 134(0x86) | PUSH1(0x60) ["0x40"] | 3 |
| 118(0x76) | MLOAD(0x51) | 3 | 136(0x88) | MLOAD(0x51) | 3 |
| 119(0x77) | PUSH1(0x60) ["0x20"] | 3 | 137(0x89) | PUSH1(0x60) ["0x20"] | 3 |
| 121(0x79) | DUP2(0x81) | 3 | 139(0x8b) | DUP2(0x81) | 3 |
| 122(0x7a) | DUP4(0x83) | 3 | 140(0x8c) | DUP4(0x83) | 3 |
| 123(0x7b) | SUB(0x3) | 3 | 141(0x8d) | SUB(0x3) | 3 |
| 124(0x7c) | SUB(0x3) | 3 | 142(0x8e) | SUB(0x3) | 3 |
| 125(0x7d) | DUP2(0x81) | 3 | 143(0x8f) | DUP2(0x81) | 3 |
| 126(0x7e) | MSTORE(0x52) | 3 | 144(0x90) | MSTORE(0x52) | 3 |
| 127(0x7f) | SWAP1(0x90) | 3 | 145(0x91) | SWAP1(0x90) | 3 |
| 128(0x80) | PUSH1(0x60) ["0x40"] | 3 | 146(0x92) | PUSH1(0x60) ["0x40"] | 3 |
| 130(0x82) | MSTORE(0x52) | 3 | 148(0x94) | MSTORE(0x52) | 3 |
| 131(0x83) | DUP1(0x80) | 3 | 149(0x95) | DUP1(0x80) | 3 |
| 132(0x84) | MLOAD(0x51) | 3 | 150(0x96) | MLOAD(0x51) | 3 |
| 133(0x85) | SWAP1(0x90) | 3 | 151(0x97) | SWAP1(0x90) | 3 |
| 134(0x86) | PUSH1(0x60) ["0x20"] | 3 | 152(0x98) | PUSH1(0x60) ["0x20"] | 3 |
| 136(0x88) | ADD(0x1) | 3 | 154(0x9a) | ADD(0x1) | 3 |
| 137(0x89) | SHA3(0x20) | 999 | 155(0x9b) | SHA3(0x20) | 999 |
| 138(0x8a) | SWAP1(0x90) | 3 | 156(0x9c) | SWAP1(0x90) | 3 |
| 139(0x8b) | POP(0x50) | 2 | 157(0x9d) | POP(0x50) | 2 |
| 140(0x8c) | SWAP2(0x91) | 3 | 158(0x9e) | SWAP2(0x91) | 3 |
| 141(0x8d) | SWAP1(0x90) | 3 | 159(0x9f) | SWAP1(0x90) | 3 |
| 142(0x8e) | POP(0x50) | 2 | 160(0xa0) | POP(0x50) | 2 |
| 143(0x8f) | JUMP(0x56) | 8 | 161(0xa1) | JUMP(0x56) | 8 |
| Total.Enc: | 1139 | Total.Pkd: | 1151 |
The change costs 12 more gas