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);

Historical Performance Data aggregated from 374 community runs

Desktop Results:

Chrome 293 runs

_.isEqual Level 1

2.1M/s

JSON.stringify Level 1

1.8M/s

JSON.stringify Level 3

1.8M/s

JSON.stringify Level 2

1.8M/s

_.isEqual Level 2

1.3M/s

_.isEqual Level 3

915K/s

Fastest: _.isEqual Level 1 (2.3x faster)

View exact numbers

✓ _.isEqual Level 1: 2,060,170 ops/sec
• JSON.stringify Level 1: 1,836,515 ops/sec
• JSON.stringify Level 3: 1,834,716 ops/sec
• JSON.stringify Level 2: 1,828,351 ops/sec
• _.isEqual Level 2: 1,257,042 ops/sec
• _.isEqual Level 3: 914,827 ops/sec

Firefox 45 runs

_.isEqual Level 1

1.3M/s

JSON.stringify Level 1

1.2M/s

JSON.stringify Level 2

1.1M/s

JSON.stringify Level 3

1.1M/s

_.isEqual Level 2

794K/s

_.isEqual Level 3

555K/s

Fastest: _.isEqual Level 1 (2.4x faster)

View exact numbers

✓ _.isEqual Level 1: 1,321,436 ops/sec
• JSON.stringify Level 1: 1,206,544 ops/sec
• JSON.stringify Level 2: 1,132,923 ops/sec
• JSON.stringify Level 3: 1,120,876 ops/sec
• _.isEqual Level 2: 793,802 ops/sec
• _.isEqual Level 3: 555,133 ops/sec

Safari 8 runs

_.isEqual Level 1

2.8M/s

JSON.stringify Level 2

2.3M/s

JSON.stringify Level 3

2.2M/s

JSON.stringify Level 1

2.2M/s

_.isEqual Level 2

1.8M/s

_.isEqual Level 3

1.3M/s

Fastest: _.isEqual Level 1 (2.2x faster)

View exact numbers

✓ _.isEqual Level 1: 2,750,001 ops/sec
• JSON.stringify Level 2: 2,299,160 ops/sec
• JSON.stringify Level 3: 2,216,348 ops/sec
• JSON.stringify Level 1: 2,180,264 ops/sec
• _.isEqual Level 2: 1,792,472 ops/sec
• _.isEqual Level 3: 1,251,686 ops/sec

Other 5 runs

_.isEqual Level 1

1.6M/s

JSON.stringify Level 3

1.2M/s

JSON.stringify Level 1

1.2M/s

JSON.stringify Level 2

1.2M/s

_.isEqual Level 2

999K/s

_.isEqual Level 3

599K/s

Fastest: _.isEqual Level 1 (2.8x faster)

View exact numbers

✓ _.isEqual Level 1: 1,648,043 ops/sec
• JSON.stringify Level 3: 1,220,860 ops/sec
• JSON.stringify Level 1: 1,218,964 ops/sec
• JSON.stringify Level 2: 1,173,936 ops/sec
• _.isEqual Level 2: 999,113 ops/sec
• _.isEqual Level 3: 599,259 ops/sec

Mobile Results:

Chrome 16 runs

_.isEqual Level 1

946K/s

JSON.stringify Level 3

814K/s

JSON.stringify Level 1

808K/s

JSON.stringify Level 2

806K/s

_.isEqual Level 2

573K/s

_.isEqual Level 3

418K/s

Fastest: _.isEqual Level 1 (2.3x faster)

View exact numbers

✓ _.isEqual Level 1: 945,701 ops/sec
• JSON.stringify Level 3: 813,533 ops/sec
• JSON.stringify Level 1: 808,378 ops/sec
• JSON.stringify Level 2: 806,269 ops/sec
• _.isEqual Level 2: 573,341 ops/sec
• _.isEqual Level 3: 417,615 ops/sec

Safari 7 runs

_.isEqual Level 1

3.3M/s

JSON.stringify Level 1

3.0M/s

JSON.stringify Level 2

3.0M/s

JSON.stringify Level 3

2.7M/s

_.isEqual Level 2

2.1M/s

_.isEqual Level 3

1.5M/s

Fastest: _.isEqual Level 1 (2.2x faster)

View exact numbers

✓ _.isEqual Level 1: 3,278,577 ops/sec
• JSON.stringify Level 1: 3,020,128 ops/sec
• JSON.stringify Level 2: 3,011,364 ops/sec
• JSON.stringify Level 3: 2,745,708 ops/sec
• _.isEqual Level 2: 2,121,736 ops/sec
• _.isEqual Level 3: 1,486,222 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 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: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Browser/OS: Chrome 149 on Mac OS X 10.15.7

View result in a separate tab

JSON.stringify Level 3

6.5M/s

JSON.stringify Level 1

6.5M/s

JSON.stringify Level 2

6.5M/s

_.isEqual Level 1

4.4M/s

_.isEqual Level 2

2.1M/s

_.isEqual Level 3

1.4M/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify Level 3	6,546,561 Ops/sec
JSON.stringify Level 1	6,506,386 Ops/sec
JSON.stringify Level 2	6,490,768 Ops/sec
_.isEqual Level 1	4,433,629 Ops/sec
_.isEqual Level 2	2,058,961 Ops/sec
_.isEqual Level 3	1,380,609 Ops/sec

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

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: 8 years ago by: Registered User

Go 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

Historical Performance Data aggregated from 374 community runs

Desktop Results:

Chrome 293 runs

Firefox 45 runs

Safari 8 runs

Other 5 runs

Mobile Results:

Chrome 16 runs

Safari 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):

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: 8 years ago by: Registered User

Go 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

Historical Performance Data aggregated from 374 community runs

Desktop Results:

Chrome 293 runs

Firefox 45 runs

Safari 8 runs

Other 5 runs

Mobile Results:

Chrome 16 runs

Safari 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: `_.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`