Benchmark: Deep merge lodash 4.12.21 vs ramda 0.27.1

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/ramda@0.27.1/dist/ramda.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.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)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Ramda.mergeDeepRight
Lodash.merge

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

A challenging question!

To answer this question, I will need to parse the input JSON data and extract the relevant information.

From the input JSON data:
```
{
  "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" }
  ]
}
```
I will write a JavaScript code snippet that uses Ramda's `mergeDeepRight` function to merge the two objects:
```javascript
const obj1 = {
  name: 'Overwritten',
  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' }
  ]
};

const obj2 = {
  name: 'Raised',
  ppu: 0.55,
  batters: {
    batter: [
      { id: '1001', type: 'Overwritten' }
    ]
  },
  topping: [
    { id: '5001', type: 'None' },
    { id: '5002', type: 'Glazed' },
    { id: '5003', type: 'Chocolate' },
    { id: '5004', type: 'Maple' }
  ]
};

const result = R.mergeDeepRight(obj1, obj2);

console.log(result);
```
This code snippet uses Ramda's `mergeDeepRight` function to merge the two objects. The resulting object will be:
```javascript
{
  "name": "Overwritten",
  "ppu": 0.55,
  "batters": {
    "batter": [
      { "id": "1001", "type": "Overwritten" }
    ]
  },
  "topping": [
    { "id": "5001", "type": "None" },
    { "id": "5002", "type": "Glazed" },
    { "id": "5003", "type": "Chocolate" },
    { "id": "5004", "type": "Maple" }
  ]
}
```
I will now compare the result with Lodash's `merge` function:
```javascript
const obj1 = {
  name: 'Overwritten',
  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' }
  ]
};

const result = _.merge(obj1, obj2);

console.log(result);
```
This code snippet uses Lodash's `merge` function to merge the two objects. The resulting object will be:
```javascript
{
  "name": "Raised",
  "ppu": 0.55,
  "batters": {
    "batter": [
      { "id": "1001", "type": "Overwritten" }
    ]
  },
  "topping": [
    { "id": "5001", type: "None" },
    { "id": "5002", type: "Glazed" },
    { "id": "5003", type: "Chocolate" },
    { "id": "5004", type: "Maple" }
  ]
}
```
I will now compare the results from both Ramda and Lodash. The resulting objects are different, which means that the merging process has produced a different outcome.

Please let me know if I'm correct!

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: 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

Browser/OS: Chrome 95 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Ramda.mergeDeepRight	252612.2 Ops/sec
Lodash.merge	34484.0 Ops/sec

Related benchmarks:

Deep merge lodash 4.12.21 vs ramda 0.27.1 (version: 0)

Comparing performance of: Ramda.mergeDeepRight vs Lodash.merge

Created: 3 years ago by: Guest

Jump to the latest result

Ramda.mergeDeepRight

Lodash.merge

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):