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storage, memory, calldata comparison in Solidity
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// SPDX-License-Identifier: GPL-3.0-or-later | |
pragma solidity ^0.8.0; | |
contract StorageTest { | |
struct ComplexStruct { | |
uint256 x; | |
uint256 y; | |
} | |
ComplexStruct public myValue; | |
function storageByRefOrValueTest () public { | |
ComplexStruct storage anotherStruct; | |
// ComplexStruct storage anotherStruct = ComplexStruct({ x:0, y:0 }); | |
anotherStruct = myValue; | |
anotherStruct.y += 100; | |
} | |
function reset () public { | |
myValue.x = 0; | |
myValue.y = 0; | |
} | |
function setStruct1 (ComplexStruct calldata c) public { // 67799 | |
// copy and increment | |
myValue = c; | |
myValue.x = myValue.x + 1; | |
myValue.y = myValue.y + 1; | |
} | |
function setStruct2 (ComplexStruct calldata c) public { // 66352 | |
// increment without copy | |
myValue.x = c.x + 1; | |
myValue.y = c.y + 1; | |
} | |
function setStruct3 (ComplexStruct memory c) public { // 67430 | |
// copy and increment | |
myValue = c; | |
myValue.x = myValue.x + 1; | |
myValue.y = myValue.y + 1; | |
} | |
function setStruct4 (ComplexStruct memory c) public { // 66937 | |
// increment without copy | |
myValue.x = c.x + 1; | |
myValue.y = c.y + 1; | |
} | |
// function test() public { | |
// setStruct1(ComplexStruct({x:1,y:2})); | |
// } | |
function getStruct () public view returns (ComplexStruct memory) { | |
return myValue; | |
} | |
} |
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