Benchmark: Underscore equal vs Lodash equal vs ===

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script type="text/javascript">
  window.lodash = _;
  _ = null;
</script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js'></script>
<script type="text/javascript">
  window.underscore = _;
  _ = null;
</script>

Script Preparation code:

var str1 = "abcdefghijklmnopqrstuvwxyz"

var str1copy = "abcdefghijklmnopqrstuvwxyz"

Tests:

Underscore equal
underscore.isEqual(str1, str1copy);
Lodash equal
lodash.isEqual(str1, str1copy);
===
str1 === str1copy

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Underscore equal
Lodash equal
===

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking test, specifically comparing the performance of three equality checks: `===`, Lodash's `isEqual()`, and Underscore's `isEqual()`.

**Equality Checks Comparison**

The benchmark tests the following equality checks:

1. **Direct Comparison (`===`)**: This is a simple in-line comparison using the triple equals operator.
2. **Lodash `isEqual()`**: A function from the popular Lodash library that performs an equality check between two values, taking into account various types and nuances of JavaScript data structures.
3. **Underscore `isEqual()`**: Another function from the Underscore.js library that provides a similar functionality to Lodash's `isEqual()`, but with some differences in its behavior.

**Pros and Cons of Each Approach**

1. **Direct Comparison (`===`)**:
	* Pros: Simple, fast, and widely supported.
	* Cons: Can lead to unexpected results when dealing with complex data structures or nuanced JavaScript features (e.g., null and undefined).
2. **Lodash `isEqual()`**:
	* Pros: More comprehensive and robust than direct comparison, handling various types and edge cases.
	* Cons: Requires an additional library import and can be slower due to the overhead of function calls.
3. **Underscore `isEqual()`**:
	* Pros: Similar to Lodash's `isEqual()`, but with some differences in its behavior (e.g., using a different implementation).
	* Cons: Also requires an additional library import and has the same performance overhead as Lodash.

**Library Descriptions**

1. **Lodash**: A popular utility library for JavaScript that provides a wide range of functions, including `isEqual()`.
2. **Underscore.js**: A functional programming-oriented library for JavaScript that includes `isEqual()` among its utilities.

**Special JavaScript Features or Syntax**

This benchmark does not explicitly test any special JavaScript features or syntax. However, it's worth noting that the use of libraries like Lodash and Underscore.js may introduce some nuances in their behavior, such as:

* **Closures**: Both Lodash and Underscore use closures to create private variables and functions.
* **Prototype Chain**: The `isEqual()` function uses a prototype chain approach to compare objects.

**Other Alternatives**

If you need alternative equality checks or want to explore other options, consider the following:

1. **Built-in `===` operator**: As mentioned earlier, this is a simple and widely supported option.
2. **JSON's `equals()` method**: If you're working with JSON data, you can use the `equals()` method provided by the JSON specification (RFC 7159).
3. **Custom implementations**: Depending on your specific requirements, you may want to implement your own equality check function using a combination of JavaScript features and algorithms.

Keep in mind that these alternatives might have different performance characteristics, behavior, or usage scenarios compared to the benchmarked options.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Underscore equal	7809310.5 Ops/sec
Lodash equal	7905311.0 Ops/sec
===	14997174.0 Ops/sec

Related benchmarks:

Underscore equal vs Lodash equal vs === (version: 0)

Comparing performance of: Underscore equal vs Lodash equal vs ===

Created: one year ago by: Guest

Jump to the latest result

Underscore equal

Lodash equal

===

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):