Benchmark: JSON.stringify vs react-fast-compare vs _.isEqual

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/react-fast-compare@3.2.0/index.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

window.a = {
    ab: {
        hello: "user",
        b: {
            aaa: 123,
            b: ["ggg"]
        },
        c: [{
            hj: "123",
            b: {
                h: "zzz"
            }
        }, {
            ll: "12r"
        }]
    },
    azz: [1, 2, 3, 5]
};

window.b = {
    ab: {
        hello: "user",
        b: {
            aaa: 123,
            b: ["ggg"]
        },
        c: [{
            hj: "123",
            b: {
                h: "zzz"
            }
        }, {
            ll: "12r"
        }]
    },
    azz: [1, 2, 3, 568]
};

Tests:

JSON.stringify
JSON.stringify(window.a) === JSON.stringify(window.b);
react-fast-compare
equal(window.a, window.b)
lodash
_.isEqual(a,b)

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

react-fast-compare

5.0M/s

JSON.stringify

1.4M/s

lodash

459K/s

Fastest: react-fast-compare (10.9x faster)

View exact numbers

✓ react-fast-compare: 4,984,200 ops/sec
• JSON.stringify: 1,413,287 ops/sec
• lodash: 459,368 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
JSON.stringify
react-fast-compare
lodash

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Edg/136.0.0.0

Browser/OS: Chrome 136 on Mac OS X 10.15.7

View result in a separate tab

react-fast-compare

1.8M/s

JSON.stringify

1.5M/s

lodash

41K/s

View exact numbers

Test name	Executions per second
✓ react-fast-compare	1,848,472 Ops/sec
JSON.stringify	1,516,499 Ops/sec
lodash	41,103 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested.

**Benchmark Definition**

The benchmark compares three approaches to check if two objects are equal: `JSON.stringify`, `react-fast-compare`, and `_`.isEqual` (from Lodash).

*   **JSON.stringify**: This approach converts both objects to a string representation using the `JSON.stringify()` method. The resulting strings are then compared for equality.
*   **React Fast Compare (`equal` function)**: This library provides an optimized way to compare complex data structures, such as arrays and objects. It uses a combination of algorithms to ensure accurate comparisons.
*   **Lodash (_).isEqual** ( `_.isEqual(a,b)` ): Lodash's `_.isEqual()` function compares two values for equality, handling various edge cases and data types.

**Pros and Cons of Each Approach**

1.  **JSON.stringify**:

*   Pros:
        *   Simple implementation
        *   Fast execution due to string comparison
    *   Cons:
        *   Limited support for complex data structures (e.g., arrays, objects with nested properties)
        *   May not work correctly for certain edge cases (e.g., cyclic references)

2.  **React Fast Compare (`equal` function)**:

*   Pros:
        *   Highly optimized and efficient
        *   Handles complex data structures and edge cases well
        *   Provides a robust way to compare objects and arrays
    *   Cons:
        *   Larger codebase compared to Lodash's `_.isEqual()`
        *   May require additional dependencies

3.  **Lodash `_`.isEqual**:

*   Pros:
        *   Lightweight implementation with minimal dependencies
        *   Robust support for various data types and edge cases
        *   Widely used in the JavaScript community
    *   Cons:
        *   May not be as optimized as React Fast Compare's `equal` function

**Library and Purpose**

*   **React Fast Compare**: A lightweight, fast, and robust library designed to compare complex data structures, such as arrays and objects. Its primary purpose is to provide an efficient way to check for equality between two values.
*   **Lodash**: A popular JavaScript utility library that provides a wide range of functions for common tasks, including string manipulation, array manipulation, and object comparison (via `_.isEqual()`).

**Special JS Feature or Syntax**

None mentioned in the provided JSON.

**Alternative Approaches**

For object comparison:

1.  **DeepEqual**: Another library specifically designed for comparing complex data structures.
2.  **JsonDiffPatch**: A library that generates a diff patch between two objects, allowing you to identify differences and update one object based on the other.

For string comparison:

1.  **Levenshtein Distance Algorithm**: Measures the similarity between two strings by calculating the minimum number of single-character edits needed to transform one into the other.
2.  **Jaro-Winkler Distance Algorithm**: An improved version of the Levenshtein distance algorithm, providing a more accurate measure of similarity.

These alternative approaches can be used depending on the specific requirements and use cases for object comparison or string matching.

JSON.stringify vs react-fast-compare vs _.isEqual (version: 0)

Comparing performance of: `JSON.stringify vs react-fast-compare vs lodash`

Created: 5 years ago by: Guest

Go to the latest result

JSON.stringify

react-fast-compare

lodash

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

JSON.stringify vs react-fast-compare vs _.isEqual (version: 0)

Comparing performance of: JSON.stringify vs react-fast-compare vs lodash

Created: 5 years ago by: Guest

Go to the latest result

JSON.stringify

react-fast-compare

lodash

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `JSON.stringify vs react-fast-compare vs lodash`