Benchmark: Underscore vs Lodash: isEqual 4

Script Preparation code:

var str1 = "awesome";
var str2 = "sauce";

function getType(obj) {
    return Object.prototype.toString.call(obj).slice(8, -1).toLowerCase();
}

 function isEqual(left, right) {
    function areArraysEqual() {
        if (left.length !== right.length) {
            return false;
        }

        // Check each item in the array
        for (let i = 0; i < left.length; i++) {
            if (!isEqual(left[i], right[i])) {
                return false;
            }
        }

        return true;
    }

    function areObjectsEqual() {
        if (Object.keys(left).length !== Object.keys(right).length) {
            return false;
        }

        // Check each item in the object
        for (let key in left) {
            if (Object.prototype.hasOwnProperty.call(left, key)) {
                if (!isEqual(left[key], right[key])) {
                    return false;
                }
            }
        }

        return true;
    }

    function areFunctionsEqual() {
        return left.toString() === right.toString();
    }

    function arePrimativesEqual() {
        return left === right;
    }

    let type = getType(left);

    if (type !== getType(right)) {
        return false;
    }

    if (type === "array") {
        return areArraysEqual();
    }

    if (type === "object") {
        return areObjectsEqual();
    }

    if (type === "function") {
        return areFunctionsEqual();
    }

    return arePrimativesEqual();

}

Tests:

Vanilla
str1 === str2
isequal test
isEqual(str1, str2)
var laa
str1 == str2

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Vanilla
isequal test
var laa

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the provided JSON benchmark data and explore what's being tested, compared, and the pros and cons of different approaches.

**Benchmark Definition**

The `Name` field in the Benchmark Definition JSON represents the name of the test, which is "Underscore vs Lodash: isEqual 4". The description explains that it compares the performance of Underscore.js (`_`) and Lodash.js (`_`) functions for equality checks.

**Test Case Options**

There are three test cases:

1. **Vanilla**: The benchmark definition is `"str1 === str2"`, which tests the native JavaScript `===` operator for equality.
2. **isequal test**: The benchmark definition is `"isEqual(str1, str2)"`, where `isEqual` is a custom function implemented by the author of the benchmark. This function checks for equality between two values using different methods (arrays, objects, functions, and primitives).
3. **var laa**: The benchmark definition is `"str1 == str2"`, which tests the native JavaScript `==` operator for equality.

**Pros and Cons of Each Approach**

Here's a brief analysis of each approach:

* **Vanilla (`===`)**:
	+ Pros: Simple, widely supported, and efficient.
	+ Cons: May not work correctly for complex data types (e.g., objects with nested arrays).
* **Underscore.js (`_isEqual`)**:
	+ Pros: Well-tested, flexible, and can handle various data types.
	+ Cons: Introduces additional dependencies and complexity.
* **Lodash.js (`_.isEqual`)**:
	+ Pros: Comprehensive equality checking, well-maintained, and widely used.
	+ Cons: Adds extra dependencies and may be slower due to the overhead of its implementation.

**Library Usage**

Both Underscore.js and Lodash.js are popular utility libraries for JavaScript. They provide a wide range of functions for tasks like array manipulation, object iteration, and functional programming.

* **Underscore.js (`_`)**: A minimalist library with a focus on functional programming and data manipulation.
* **Lodash.js (`_`)**: A more comprehensive library with over 120 utility functions, including equality checking.

**Special JS Features or Syntax**

None of the test cases use special JavaScript features or syntax beyond what's standard in modern JavaScript implementations. However, it's worth noting that some browsers may exhibit variations in behavior for certain equality checks due to their implementation details (e.g., `===` vs. `==`).

**Alternatives**

Other alternatives for equality checking include:

* **JSON.stringify() and JSON.parse()**: Can be used to compare objects by converting them to strings.
* **Recursion and custom loops**: Can be used to implement custom equality checks, but may be less efficient than built-in functions or libraries.
* **Third-party libraries like DeepEqual or equality-checker**: Specialized libraries for equality checking that can provide more comprehensive support for various data types.

In summary, the benchmark tests different approaches for equality checking in JavaScript, comparing native operators (`===` and `==`) with custom implementations using Underscore.js and Lodash.js.

Related benchmarks:

Underscore vs Lodash: isEqual 4 (version: 0)

Compare Underscore vs Lodash isEqual. Which is faster?

Comparing performance of: Vanilla vs isequal test vs var laa

Created: 4 years ago by: Guest

Jump to the latest result

Vanilla

isequal test

var laa

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):