Benchmark: Lodash.isEqual vs JSON.stringify Equality Deep Comparison for Shallow Array of Strings.

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

window.foo = [
    'cat',
    'dog',
    'bird',
    {
        banana: {
            color: 'yellow'
        },
    },
];
window.bar = [{
        banana: {
            color: 'yellow'
        },
    },
    'cat',
    'dog',
    'bird',
];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
JSON.stringify(window.foo) === JSON.stringify(window.bar);

Historical Performance Data aggregated from 24 community runs

Desktop Results:

Chrome 24 runs

_.isEqual

5.5M/s

JSON.stringify

3.3M/s

Fastest: _.isEqual (1.7x faster)

View exact numbers

✓ _.isEqual: 5,450,525 ops/sec
• JSON.stringify: 3,300,171 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser/OS: Chrome 145 on Mac OS X 10.15.7

View result in a separate tab

_.isEqual

8.5M/s

JSON.stringify

8.0M/s

View exact numbers

Test name	Executions per second
✓ _.isEqual	8,493,323 Ops/sec
JSON.stringify	7,990,146 Ops/sec

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

LLMs can make mistakes. Check important info.

This benchmark compares two methods for checking if two arrays are equal: Lodash's `isEqual` function and using `JSON.stringify`.

**Options Compared:**

* **`_.isEqual(window.foo, window.bar)`:** This utilizes the `isEqual` function from the Lodash library. Lodash is a popular JavaScript utility library that provides a wide range of helpful functions for working with arrays, objects, strings, and more.  
    * **Pros:** 
        * Designed specifically for deep equality comparisons, handling nested objects and arrays correctly. 
        * Often performs optimizations to make comparisons faster.
    * **Cons:** 
        * Adds an extra dependency to your project (Lodash).

* **`JSON.stringify(window.foo) === JSON.stringify(window.bar);`:** This approach stringifies both arrays using `JSON.stringify` and then compares the resulting strings for equality.
    * **Pros:** 
        * Built-in JavaScript functionality, no extra dependencies required.
    * **Cons:**  
        * Only checks for shallow equality (equal values at the same positions). Doesn't handle nested objects and arrays correctly. May produce different results if objects have circular references.

**Other Considerations:**

* **Data Complexity:** If you're dealing with deeply nested objects or complex array structures, `_.isEqual` is generally a better choice as it handles these situations more reliably.
* **Performance:**  While Lodash aims to be efficient, `JSON.stringify` might be faster in some simple cases where shallow equality is sufficient. The benchmark results here show that `_.isEqual` is significantly faster for this particular dataset.

**Alternatives:**

* For a lightweight option without a library dependency, you could consider manually implementing a shallow equality check yourself if your data structures are relatively simple.
* Libraries like "ramda" or "Immutable.js" offer alternative approaches to working with data immutability and comparison.

Let me know if you have any other questions!

Lodash.isEqual vs JSON.stringify Equality Deep Comparison for Shallow Array of Strings. (version: 0)

Test on isEqual performance

Comparing performance of: `_.isEqual vs JSON.stringify`

Created: 5 years ago by: Guest

Go to the latest result

_.isEqual

JSON.stringify

Historical Performance Data aggregated from 24 community runs

Desktop Results:

Chrome 24 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

Lodash.isEqual vs JSON.stringify Equality Deep Comparison for Shallow Array of Strings. (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 5 years ago by: Guest

Go to the latest result

_.isEqual

JSON.stringify

Historical Performance Data aggregated from 24 community runs

Desktop Results:

Chrome 24 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

Related benchmarks

Comparing performance of: `_.isEqual vs JSON.stringify`