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Run results for:
Deep merge lodash vs ramda vs deepmerge vs json clone
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=582574" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Ramda.mergeDeepRight
610K/s
json clone
169K/s
deepmerge
95K/s
Lodash.merge
94K/s
Lodash.merge immutable
34K/s
View exact numbers
Test name
Executions per second
✓
Ramda.mergeDeepRight
610,474 Ops/sec
json clone
168,638 Ops/sec
deepmerge
94,553 Ops/sec
Lodash.merge
93,556 Ops/sec
Lodash.merge immutable
34,364 Ops/sec
HTML Preparation code:
<script src="//cdn.jsdelivr.net/npm/ramda@latest/dist/ramda.min.js"></script> <script src="https://raw.githubusercontent.com/lodash/lodash/4.17.15-npm/lodash.js"></script> <script src="https://unpkg.com/deepmerge/dist/umd.js"></script>
Script Preparation code:
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)
deepmerge
deepmerge(obj1, obj2)
json clone
JSON.parse(JSON.stringify(obj1))
Lodash.merge immutable
_.merge({}, obj1, obj2)