Run results for: _Mhai's Code

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4096.0 Safari/537.36

Browser: Chrome 83

Operating system: Mac OS X 10.15.4

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
MhaiCode	571695.1 Ops/sec
Native1	10977953.0 Ops/sec
Native2	10450190.0 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>

Script Preparation code:

var data = {
    'member_info_decrypt': [{
            'firebase_id': '1',
            'member_id': '1',
            'mobile_no': '1',
        },
        {
            'firebase_id': '2',
            'member_id': '2',
            'mobile_no': '2',
        },
        {
            'firebase_id': '3',
            'member_id': '3',
            'mobile_no': '3',
        }
    ]
};

Tests:

MhaiCode
_.map(data.member_info_decrypt, object => { return _.pick(object, ['firebase_id', 'member_id', 'mobile_no']) })
Native1
const items = data.member_info_decrypt; items.map(({firebase_id,member_id,mobile_no})=>({firebase_id,member_id,mobile_no}))
Native2
const items = data.member_info_decrypt; const length = items.length; const result = []; for(var i=0; i<length; i++) { const {firebase_id,member_id,mobile_no} = items[i]; result[i] = { firebase_id,member_id,mobile_no } }

Run results for: _Mhai's Code

Compare the new ES6 spread operator with the traditional concat() method

MhaiCode

Native1

Native2