Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
Chrome 95
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
Ramda.mergeDeepRight 25672.7 Ops/sec
Lodash.merge 33821.0 Ops/sec
HTML Preparation code:
AخA
 
1
<script src="https://unpkg.com/rambda@6.9.0/dist/rambda.umd.js"></script>
2
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
Script Preparation code:
x
 
var obj1 = [
    {
        "id": "0001",
        "type": "donut",
        "name": "Cake",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Regular" },
                        { "id": "1002", "type": "Chocolate" },
                        { "id": "1003", "type": "Blueberry" },
                        { "id": "1004", "type": "Devil's Food" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5007", "type": "Powdered Sugar" },
                { "id": "5006", "type": "Chocolate with Sprinkles" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    },
    {
        "id": "0002",
        "type": "donut",
        "name": "Raised",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Regular" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    },
    {
        "id": "0003",
        "type": "donut",
        "name": "Old Fashioned",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Regular" },
                        { "id": "1002", "type": "Chocolate" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    }
]
var obj2 = [
    {
        "id": "0001",
        "type": "donut",
        "name": "Cake",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Overwritten" },
                        { "id": "1002", "type": "Chocolate" },
                        { "id": "1003", "type": "Overwritten" },
                        { "id": "1004", "type": "Devil's Food" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "Overwritten" },
                { "id": "5002", "type": "Overwritten" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5007", "type": "Powdered Sugar" },
                { "id": "5006", "type": "Chocolate with Sprinkles" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Overwritten" }
            ]
    },
    {
        "id": "0002",
        "type": "Overwritten",
        "name": "Raised",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Overwritten" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Overwritten" },
                { "id": "5005", "type": "Sugar" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    },
    {
        "id": "0003",
        "type": "Overwritten",
        "name": "Old Fashioned",
        "ppu": 0.55,
        "batters":
            {
                "batter":
                    [
                        { "id": "1001", "type": "Overwritten" },
                        { "id": "1002", "type": "Chocolate" }
                    ]
            },
        "topping":
            [
                { "id": "5001", "type": "None" },
                { "id": "5002", "type": "Glazed" },
                { "id": "5003", "type": "Chocolate" },
                { "id": "5004", "type": "Maple" }
            ]
    }
]
Tests:
  • Ramda.mergeDeepRight

     
    R.mergeDeepRight(obj1, obj2)
  • Lodash.merge

     
    _.merge(obj1, obj2)