Benchmark: Lodash.isEqual vs JSON.stringify vs join : Equality 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'];
window.bar = ['cat', 'dog', 'bird'];

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.stringify
join

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Goal**

The primary goal of this benchmark is to compare the performance of three equality comparison methods for shallow arrays of strings:

1. **Lodash.isEqual**: A function from the Lodash library that compares two objects or values for deep equality.
2. **JSON.stringify**: A JavaScript method that converts an object or value into a JSON string, which can be compared for equality.
3. **join()**: A string method that concatenates all elements in an array into a single string.

**Benchmark Options**

The three options are compared using the following benchmark definitions:

1. `_.isEqual(window.foo, window.bar)`
2. `JSON.stringify(window.foo) === JSON.stringify(window.bar)`
3. `window.foo.join('') === window.bar.join('')`

These options have different pros and cons:

* **Lodash.isEqual**: Pros:
	+ Performs a deep equality check, which can be more accurate than shallow checks.
	+ Often used for complex data structures, like objects or arrays with nested elements.
* Cons:
	+ May be slower than other methods due to its more comprehensive comparison.
	+ Requires the Lodash library, which may add overhead.
* **JSON.stringify**: Pros:
	+ Simple and fast, as it only compares string values.
	+ Does not require any libraries beyond the built-in JavaScript.
* Cons:
	+ Only works for strings, not objects or other data types.
	+ May lose precision when converting non-string values to strings.
* **join()**: Pros:
	+ Fast and efficient, as it only concatenates strings.
	+ Works well for shallow arrays of strings.
* Cons:
	+ May produce unexpected results if the array contains non-string elements.

**Library Usage**

The Lodash library is used in one of the benchmark options (`_.isEqual`). The purpose of this function is to perform a deep equality check between two objects or values, which can be useful when working with complex data structures.

**Special JS Features/Syntax (None)**

There are no special JavaScript features or syntax used in this benchmark that would require additional explanation.

**Other Alternatives**

If you need to compare the performance of other equality comparison methods, consider using the following alternatives:

1. **Array.prototype.every()**: A method that returns true if all elements in an array pass a test.
2. **Array.prototype.some()**: A method that returns true if any element in an array passes a test.
3. **Array.prototype.indexOf()** or **Array.prototype.includes()**: Methods that search for a specific value within an array.
4. **Object.is()**: A function from the JavaScript standard library (ES6+) that performs a more nuanced equality check than ==.

These alternatives may have different performance characteristics and use cases, so it's essential to test them in your specific scenario.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser/OS: Chrome 107 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEqual	2680063.8 Ops/sec
JSON.stringify	1762442.6 Ops/sec
join	3221282.5 Ops/sec

Related benchmarks:

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

Test on isEqual performance

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

Created: 2 years ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

join

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):