Benchmark: Lodash isEqual vs JSON stringify1

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

​x
 
​
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

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var myCopy = null;

 
var MyObject = {    "location": {        "name": "Lobby",        "id": "70ea2d94-2d21-4d9e-ae4d-bd3b5fa76562"    },    "question": {        "text": "Which setting worked best for you today?",        "id": "0033a643-ae51-4115-b392-a3939a54a06f",        "answerOrder": [            "b564a8fd-ec39-4fdd-9531-e7875d5e43e2",            "cd8bb606-4b94-42c5-b76c-bd67df09caa6",            "0ae345a5-eb4a-4415-aab1-de3789c6700e",            "52a60c7f-f5bb-4be2-af56-59c2dd2e49d4"        ]    },    "answers": [        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/cd8bb606-4b94-42c5-b76c-bd67df09caa6/31c403f4-07e7-4294-8409-3cbc5379beb3.jpg",            "ansType": 1,            "id": "cd8bb606-4b94-42c5-b76c-bd67df09caa6",            "tags": "",            "link": "",            "linkDescription": "",            "linkAction": "embed"        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/b564a8fd-ec39-4fdd-9531-e7875d5e43e2.png",            "ansType": 1,            "id": "b564a8fd-ec39-4fdd-9531-e7875d5e43e2",            "tags": ""        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/0ae345a5-eb4a-4415-aab1-de3789c6700e.png",            "ansType": 1,            "id": "0ae345a5-eb4a-4415-aab1-de3789c6700e",            "tags": ""        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/52a60c7f-f5bb-4be2-af56-59c2dd2e49d4/7737b24e-c45f-4517-a626-def4c2045ff9.jpg",            "ansType": 1,            "id": "52a60c7f-f5bb-4be2-af56-59c2dd2e49d4",            "tags": "",            "link": "",            "linkDescription": "",            "linkAction": "embed"        }    ]};​var MyObject2 = {    "location": {        "name": "Lobby",        "id": "70ea2d94-2d21-4d9e-ae4d-bd3b5fa76562"    },    "question": {        "text": "Which setting worked best for you today?",        "id": "0033a643-ae51-4115-b392-a3939a54a06f",        "answerOrder": [            "b564a8fd-ec39-4fdd-9531-e7875d5e43e2",            "cd8bb606-4b94-42c5-b76c-bd67df09caa6",            "0ae345a5-eb4a-4415-aab1-de3789c6700e",            "52a60c7f-f5bb-4be2-af56-59c2dd2e49d4"        ]    },    "answers": [        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/cd8bb606-4b94-42c5-b76c-bd67df09caa6/31c403f4-07e7-4294-8409-3cbc5379beb3.jpg",            "ansType": 1,            "id": "cd8bb606-4b94-42c5-b76c-bd67df09caa6",            "tags": "",            "link": "",            "linkDescription": "",            "linkAction": "embed"        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/b564a8fd-ec39-4fdd-9531-e7875d5e43e2.png",            "ansType": 1,            "id": "b564a8fd-ec39-4fdd-9531-e7875d5e43e2",            "tags": ""        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/0ae345a5-eb4a-4415-aab1-de3789c6700e.png",            "ansType": 1,            "id": "0ae345a5-eb4a-4415-aab1-de3789c6700e",            "tags": ""        },        {            "text": "https://qranswerspdfs124808-dev.s3.amazonaws.com/public/answers/2583ae83-ec67-41c0-a837-f277e8440328/52a60c7f-f5bb-4be2-af56-59c2dd2e49d4/7737b24e-c45f-4517-a626-def4c2045ff9.jpg",            "ansType": 1,            "id": "52a60c7f-f5bb-4be2-af56-59c2dd2e49d4",            "tags": "",            "link": "",            "linkDescription": "",            "linkAction": "embed"        }    ]};​var myCopy = null;​

Tests:

Lodash cloneDeep
_.isEqual(MyObject, MyObject2);
_.isEqual(MyObject, MyObject2);
Json clone
JSON.stringify(MyObject) === JSON.stringify(MyObject2);
JSON.stringify(MyObject) === JSON.stringify(MyObject2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
Lodash cloneDeep
Json clone

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 13 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	263366.9 Ops/sec
Json clone	301980.2 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 13 days ago):

In the benchmark named "Lodash isEqual vs JSON stringify1", two different approaches for comparing JavaScript objects are tested: _.isEqual from Lodash and the native JSON.stringify method. The aim is to evaluate the performance of these two methods in terms of execution speed.

Test Cases

Lodash isEqual
- Benchmark Definition: _.isEqual(MyObject, MyObject2);
- Library Used: Lodash
  - Purpose: Lodash is a JavaScript library that provides utility functions for common programming tasks. The _.isEqual method deep compares two values to determine if they are equivalent. It will check not only the object references but also their properties and nested structures.
- Pros and Cons:
  - Pros:
    - Accurately compares nested objects, arrays, and different data types.
    - Handles edge cases well, such as comparing types of elements and treating cyclical references appropriately.
  - Cons:
    - Can be slower due to its comprehensive checks, especially with large or deeply nested objects.
    - Introduces an additional dependency (Lodash) into the project.
JSON stringify
- Benchmark Definition: JSON.stringify(MyObject) === JSON.stringify(MyObject2);
- Library Used: None (native JavaScript method)
- Purpose: The JSON.stringify method converts a JavaScript object into a JSON string. This string can then be compared using strict equality (===).
- Pros and Cons:
  - Pros:
    - Simpler and faster for quick comparisons between objects, assuming that the order of properties is the same.
    - No additional libraries are needed, reducing overhead.
  - Cons:
    - Will fail to accurately compare objects if property order differs, as string representation can vary.
    - Does not handle complex data types like functions, dates, undefined, or circular references well; these will be ignored or throw errors.
    - Not capable of distinguishing between equivalent objects that contain the same data but in different structures.

Performance Results

Based on the benchmark results:

JSON.stringify: Executions per second: 301,980.19
Lodash isEqual: Executions per second: 263,366.87

This indicates that the JSON.stringify method is significantly faster for the input objects being tested when compared to Lodash's isEqual.

Other Considerations

The choice between these two methods depends on the specific requirements of the application. If accuracy in comparing object structures is crucial, the Lodash method should be used despite its slower performance. For lightweight checks where performance is a priority and property order is consistent, JSON.stringify suffices.
Alternatives exist beyond these options:
- Deep Comparison Libraries: There are other libraries, such as deep-equal or fast-deep-equal, which may offer similar functionality with different performance characteristics.
- Manual Comparison Logic: Implementing a custom deep comparison function tailored for specific use cases may also be an option if performance is critical and the structure is known.
- Using ES6 methods like Map or Set for specific cases where unique groupings or mappings of objects are needed, especially when the data sets are of simpler structures.

In conclusion, this benchmark provides valuable insights into the trade-offs between accuracy and performance when comparing JavaScript objects, guiding developers in choosing the right approach suited for their specific scenarios.

LLMs can make mistakes. Check important info.

In the benchmark named **"Lodash isEqual vs JSON stringify1"**, two different approaches for comparing JavaScript objects are tested: `_.isEqual` from Lodash and the native `JSON.stringify` method. The aim is to evaluate the performance of these two methods in terms of execution speed.

### Test Cases
1. **Lodash `isEqual`**
   - **Benchmark Definition:** `_.isEqual(MyObject, MyObject2);`
   - **Library Used:** Lodash
     - **Purpose:** Lodash is a JavaScript library that provides utility functions for common programming tasks. The `_.isEqual` method deep compares two values to determine if they are equivalent. It will check not only the object references but also their properties and nested structures.
   - **Pros and Cons:**
     - **Pros:**
       - Accurately compares nested objects, arrays, and different data types.
       - Handles edge cases well, such as comparing types of elements and treating cyclical references appropriately.
     - **Cons:**
       - Can be slower due to its comprehensive checks, especially with large or deeply nested objects.
       - Introduces an additional dependency (Lodash) into the project.

2. **JSON `stringify`**
   - **Benchmark Definition:** `JSON.stringify(MyObject) === JSON.stringify(MyObject2);`
   - **Library Used:** None (native JavaScript method)
   - **Purpose:** The `JSON.stringify` method converts a JavaScript object into a JSON string. This string can then be compared using strict equality (===).
   - **Pros and Cons:**
     - **Pros:**
       - Simpler and faster for quick comparisons between objects, assuming that the order of properties is the same.
       - No additional libraries are needed, reducing overhead.
     - **Cons:**
       - Will fail to accurately compare objects if property order differs, as string representation can vary.
       - Does not handle complex data types like functions, dates, `undefined`, or circular references well; these will be ignored or throw errors.
       - Not capable of distinguishing between equivalent objects that contain the same data but in different structures.

### Performance Results
Based on the benchmark results:
- **JSON.stringify:** Executions per second: **301,980.19**
- **Lodash `isEqual`:** Executions per second: **263,366.87**

This indicates that the `JSON.stringify` method is significantly faster for the input objects being tested when compared to Lodash's `isEqual`.

### Other Considerations
- The choice between these two methods depends on the specific requirements of the application. If accuracy in comparing object structures is crucial, the Lodash method should be used despite its slower performance. For lightweight checks where performance is a priority and property order is consistent, `JSON.stringify` suffices.
- Alternatives exist beyond these options:
  - **Deep Comparison Libraries:** There are other libraries, such as `deep-equal` or `fast-deep-equal`, which may offer similar functionality with different performance characteristics.
  - **Manual Comparison Logic:** Implementing a custom deep comparison function tailored for specific use cases may also be an option if performance is critical and the structure is known.
  - **Using ES6 methods like `Map` or `Set` for specific cases** where unique groupings or mappings of objects are needed, especially when the data sets are of simpler structures.

Related benchmarks:

Lodash isEqual vs JSON stringify1 (version: 1)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 13 days ago by: Guest

Jump to the latest result

Lodash cloneDeep

Json clone