Benchmark: Lodash isEqual test 2

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
2 === 2
_.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: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36

Browser/OS: Chrome 69 on Mac OS X 10.13.6

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	422053.6 Ops/sec
JSON.stringify Level 1	673261632.0 Ops/sec
_.isEqual Level 2	267784.1 Ops/sec
JSON.stringify Level 2	269458.9 Ops/sec
_.isEqual Level 3	199711.3 Ops/sec
JSON.stringify Level 3	235305.6 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down what's being tested, compared, and the pros/cons of different approaches.

**What is being tested?**

MeasureThat.net is testing the performance of `_.isEqual` from Lodash library. The test cases cover three levels of nested objects:

1. Level 1: Two identical objects with one level of nesting (`foo1` and `bar1`)
2. Level 2: Two identical objects with two levels of nesting (`foo2` and `bar2`)
3. Level 3: Two identical objects with three levels of nesting (`foo3` and `bar3`)

The test also includes a simple comparison using the `===` operator on stringified versions of the objects.

**What options are compared?**

In this benchmark, only two options are being compared:

1. Lodash's `_isEqual` function
2. A simple `===` operator comparison

**Pros and Cons:**

**Lodash's `_isEqual` function:**

Pros:

* Handles nested objects recursively
* Can be used to compare complex data structures
* Part of a well-maintained library with a wide range of features

Cons:

* May have performance overhead due to the recursive nature of the comparison
* Requires an external dependency (Lodash)

**Simple `===` operator comparison:**

Pros:

* Fast and lightweight
* Does not require any external dependencies

Cons:

* Only works for primitive types or stringified versions of objects
* Does not handle nested objects recursively
* May lead to false positives if the objects being compared are not exactly equal

**Other considerations:**

The benchmark also includes a comparison using `JSON.stringify`, which can be useful in certain situations, such as when comparing JSON data. However, this approach may not work well for all types of data and may lead to performance issues due to the overhead of stringifying objects.

**Lodash library and its purpose:**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and functional programming. The `_isEqual` function is specifically designed to compare two values for equality, handling nested objects and arrays recursively.

If you're not familiar with Lodash, it's worth exploring its documentation and examples to learn more about the library and its features.

**Special JS feature or syntax:**

There are no special JavaScript features or syntax used in this benchmark. The code is straightforward and uses only standard JavaScript constructs.

Other alternatives to MeasureThat.net include:

* Benchmarking libraries like Benchmark.js, which provide a simple way to write benchmarks using Node.js.
* Online testing platforms like jsPerf, which allow you to test your code's performance in a head-to-head format against others.

Related benchmarks:

Lodash isEqual test 2 (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: 6 years ago by: Guest

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 2 months ago):