test1_solc

test1.sol

pragma solidity ^0.4.24;

contract TestA {
    struct Test {
        address _address;
    }
    
    struct Test2 {
        address account; 
        address _address;
    }
    
    mapping(address => Test) _mapping;
    Test2[] _list;
    mapping(address => bool) _has;
    mapping(address => uint) _indexes;
    address[] _addresses;
    
    function addv1() public {
        _mapping[msg.sender]._address = msg.sender;
        
        if (!_has[msg.sender]) {
            _addresses.push(msg.sender);
            _has[msg.sender] = true;
        }
    }
    
    function removev1() public {
        for(uint i = 0; i < _addresses.length; i++) {
            _has[_addresses[i]] = false;
        }
        
        _addresses.length = 0;
    }
    
    function addv2() public {
        for(uint i = 0; i < _list.length; i++) {
            if(_list[i].account == msg.sender) {
                _list[i]._address = msg.sender;
                return;
            }
        }
        
        _list.push(Test2({ account: msg.sender, _address: msg.sender }));
    }
    
    function removev2() public {
        _list.length = 0;
    }
    
    function addv3() public {
        _mapping[msg.sender]._address = msg.sender;
        
        for(uint i = 0; i < _addresses.length; i++) {
            if (_addresses[i] == msg.sender) return;
        }
        
        _addresses.push(msg.sender);
    }
    
    function removev3() public {
        _addresses.length = 0;
    }
    
    function addv4() public {
        if(_has[msg.sender]) {
            _list[_indexes[msg.sender]]._address = msg.sender;
            return;
        }
        _has[msg.sender] = true;
        _indexes[msg.sender] = _list.length;
        _list.push(Test2({ account: msg.sender, _address: msg.sender }));
    }
    
    function removev4() public {
        for(uint i = 0; i < _list.length; i++) {
            _has[_list[i].account] = false;
        }
        
        _list.length = 0;
    }
}

1 records | gas
1 | 81828 + 17081 (103100 + 19177) | 98909 (122277)
2 | 61493 + 16149 (82765 + 18711)  | 77642 (101476)
3 | 61417 + 10624 (82689 + 15948)  | 72041 (98637)
4 | 87235 + 22689 (108507 + 21981) | 109924 (130488)

1 records (overwrite) | gas
1 | 66828 + 17081 (88100 + 19177) | 83909 (107277)
2 | 61493 + 16149 (82765 + 18711)  | 77642 (101476)
3 | 46417 + 10624 (67689 + 15948)  | 57041 (83637)
4 | 87235 + 22689 (108507 + 21981) | 109924 (130488)

3 records | gas
1 | 81828 + 66828 + 66828 + 39481 (103100 + 88100 + 88100 + 30377)   | 254965 (309677)
2 | 61493 + 47333 + 48173 + 37237 (82765 + 68605 + 69445 + 29255)    | 194236 (250070)
3 | 61417 + 47240 + 48063 + 20738 (82689 + 68512 + 69335 + 21005)    | 177458 (241541)
4 | 87235 + 87235 + 87235 + 56097 (108507 + 108507 + 108507 + 38685) | 317802 (364206)

3 records (overwrite) | gas
1 | 66828 + 51828 + 51828 + 39481 (88100 + 73100 + 73100 + 30377)    | 209965 (264677)
2 | 61493 + 47333 + 48173 + 37237 (82765 + 68605 + 69445 + 29255)    | 194236 (250070)
3 | 46417 + 32240 + 33063 + 20738 (67689 + 53512 + 54335 + 21005)    | 132458 (196541)
4 | 87235 + 72235 + 72235 + 56097 (108507 + 93507 + 93507 + 38685)   | 287802 (334206)