Benchmark: Lodash isEqual test

HTML Preparation code:

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

Script Preparation code:

// 1 level deep
window.foo1 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar1 = { a: 1, b: 3, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };

// 2 levels deep
window.foo2 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar2 = { a: 1, b: 2, c: { a: 1, b: 3, c: { a: 1, b: 2 } } };

// 3 levels deep
window.foo3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } };

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
JSON.stringify Level 1
JSON.stringify(window.foo1) === JSON.stringify(window.bar1);
_.isEqual Level 2
_.isEqual(window.foo2, window.bar2)
JSON.stringify Level 2
JSON.stringify(window.foo2) === JSON.stringify(window.bar2);
_.isEqual Level 3
_.isEqual(window.foo3, window.bar3)
JSON.stringify Level 3
JSON.stringify(window.foo3) === JSON.stringify(window.bar3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual Level 1
JSON.stringify Level 1
_.isEqual Level 2
JSON.stringify Level 2
_.isEqual Level 3
JSON.stringify Level 3

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 hours ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.0

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	2480110.8 Ops/sec
JSON.stringify Level 1	2297573.5 Ops/sec
_.isEqual Level 2	1272226.8 Ops/sec
JSON.stringify Level 2	2011860.2 Ops/sec
_.isEqual Level 3	812705.1 Ops/sec
JSON.stringify Level 3	2232248.2 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Measuring the performance of JavaScript microbenchmarks is crucial for developers to optimize their code and ensure it runs efficiently.

**Benchmark Definition:**
The benchmark is designed to test the performance of Lodash's `isEqual` function on objects with nested structures.

**Options Compared:**

1. **Lodash's isEqual**: The primary method being tested, which compares two objects for equality.
2. **JSON.stringify comparison**: A simple string comparison between JSON representations of the same object.

**Pros and Cons of Each Approach:**

*   Lodash's `isEqual`:
    *   Pros: Handles complex nested structures with ease, including cyclic references.
    *   Cons: Can be slower due to its recursive nature and handling of deep objects.
*   JSON.stringify comparison:
    *   Pros: Fast and simple, as it only involves creating a string representation of the object.
    *   Cons: May not accurately represent the object's structure or nested relationships.

**Library:**
Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and more. In this benchmark, Lodash's `isEqual` function is being tested for its performance on objects with complex nested structures.

**Special JS Features/Syntax:**
None mentioned in the provided code.

**Benchmark Preparation Code:**

The script preparation code creates three objects (`foo1`, `bar1`, `foo2`, `bar2`, and `foo3`, `bar3`) with increasingly nested structures. These objects are then used to test the performance of Lodash's `isEqual` function using both the direct comparison method and JSON.stringify.

**Other Alternatives:**

*   **JSONschema**: Another popular library for validating and comparing JSON data.
*   **DeepEqual**: A simple, fast, and reliable way to compare deeply nested objects.

Related benchmarks:

Lodash isEqual test (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual Level 1 vs JSON.stringify Level 1 vs _.isEqual Level 2 vs JSON.stringify Level 2 vs _.isEqual Level 3 vs JSON.stringify Level 3

Created: 7 years ago by: Registered User

Jump to the latest result

_.isEqual Level 1

JSON.stringify Level 1

_.isEqual Level 2

JSON.stringify Level 2

_.isEqual Level 3

JSON.stringify Level 3

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):