Benchmark: Lodash isEqual test with arrays

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 = ['one', 'two', 'three'];
window.bar1 = ['four', 'five', 'six'];

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
JSON.stringify Level 1
JSON.stringify(window.foo1.sort()) === JSON.stringify(window.bar1.sort());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and explain what's being tested, compared, and considered.

**Overview**

The MeasureThat.net website allows users to create and run JavaScript microbenchmarks. The provided JSON represents a benchmark that tests the performance of the `_.isEqual` function from Lodash, a popular utility library for functional programming in JavaScript.

**Test Cases**

There are two test cases:

1. **_.isEqual Level 1**: This test case compares two arrays (`window.foo1` and `window.bar1`) using the `_isEqual` function.
2. **JSON.stringify Level 1**: This test case compares the sorted versions of the same two arrays using `JSON.stringify`.

**Library: Lodash**

Lodash is a JavaScript library that provides a collection of reusable functions for functional programming tasks, such as array manipulation, object manipulation, and more.

The `_isEqual` function from Lodash checks whether two values are deeply equal. In this benchmark, it's used to compare the equality of two arrays.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax mentioned in this benchmark. It only uses standard JavaScript features like arrays and object properties.

**Comparison Options**

The comparison options being tested are:

1. **_.isEqual**: This method checks whether two values are deeply equal.
2. **JSON.stringify + sorting**: This approach creates a new array by sorting the elements of each original array, then compares the sorted arrays using `JSON.stringify`. The `JSON.stringify` function is used to convert the arrays into a string format, allowing for comparison.

**Pros and Cons**

Here's a brief summary of the pros and cons of each comparison option:

1. **_.isEqual**
	* Pros: Fast and efficient, as it only checks equality without sorting.
	* Cons: May not be suitable for certain data types or structures that require sorting before comparison (e.g., objects with non-numeric keys).
2. **JSON.stringify + sorting**
	* Pros: Suitable for comparing arrays of equal length, can handle non-numeric keys in objects, and provides a simple way to compare sorted arrays.
	* Cons: Requires sorting the arrays, which may not be necessary for all use cases; `JSON.stringify` can be slower than direct comparison methods.

**Other Alternatives**

Some alternative approaches could be:

1. **Array.prototype.every() or Array.prototype.some()**: These methods can be used to compare arrays element-wise.
2. **Object.keys() and array iteration**: This approach can be used for comparing objects with numeric keys.
3. **ES6+ equality operators (===, !==, ==, etc.)**: While these operators are generally faster than custom implementations, they may not be suitable for all data types or structures.

Keep in mind that the choice of comparison method depends on the specific use case and requirements.

Related benchmarks:

Lodash isEqual test with arrays (version: 0)

Test on isEqual performance

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

Created: 5 years ago by: Guest

Jump to the latest result

_.isEqual Level 1

JSON.stringify Level 1

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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