pragma solidity ^0.4.24; contract FreeMemory2 { struct Increase { uint dist; uint src; } function callFuncMemoryCheck(uint a, bool _memoryUse) public pure returns(uint) { uint res = a; Increase memory increase; increase.src = a; for(uint i=0; i<a; i++) { if(_memoryUse) { increase = doExec(increase); } else { res = addFunc(res, 5); } } assembly { res := mload(0x40) } return res; } function addFunc(uint a, uint b) internal pure returns(uint) { return a + b; } function doExec(Increase memory inc) internal pure returns(Increase memory) { inc.dist += inc.src; return inc; } } 0.4.24