Benchmark: lodash isEqual to manual equal

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>

Script Preparation code:

var j1 = {
  "S": {
    "Property1": {
      "Coord": 7951392.9519541,
      "Property2": "Solid",
      "Property3": {
        "Color": [
          255,
          255,
          255,
          59
        ]
      },
      "BackgroundColour": {
        "Color": [
          255,
          255,
          0,
          255
        ]
      }
    }
  }
};
var j2 = {
  "S": {
    "Property1": {
      "Coord": 7951392.9519541,
      "Property2": "Solid",
      "Property3": {
        "Color": [
          255,
          255,
          255,
          60
        ]
      },
      "BackgroundColour": {
        "Color": [
          255,
          255,
          0,
          255
        ]
      }
    }
  }
};
function isEqual(first, second) {
  if (first === undefined || first === null || second === undefined || second === null) {
    return first === second;
  }
  if (first.constructor === Object && second.constructor === Object) {
    var firstKeys = Object.keys(first).sort(function(i1, i2){ 
    	return i1.localeCompare(i2);
    });
    var secondKeys = Object.keys(second).sort(function(i1, i2){ 
    	return i1.localeCompare(i2);
    });
    if (firstKeys.length !== secondKeys.length) {
      return false;
    }
    var result = true;
    for (var i = 0; i < firstKeys.length && result; i++) {
      result &&= firstKeys[i] === secondKeys[i] && isEqual(first[firstKeys[i]], second[secondKeys[i]]);
    }
    return result;
  }

  if (first.constructor === Array && second.constructor === Array) {
    if (first.length !== second.length) {
      return false;
    }
    var result = true;
    for (var i = 0; i < first.length && result; i++) {
      result &&= isEqual(first[i], second[i]);
    }
    return result;
  }
  return first === second;
}

Tests:

Lodash
_.isEqual(j1, j1); _.isEqual(j1, j2);
Manual
isEqual(j1, j1); isEqual(j1, j2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
Manual

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, compared, and their pros/cons.

**Benchmark Definition JSON**

The benchmark compares two approaches to equality checking: Lodash's `isEqual` function and a manual implementation of equality checking using JavaScript primitives (e.g., `===`, `typeof`, `Object.keys()`, etc.).

**Lodash `isEqual` Function**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like string manipulation, array manipulation, and object comparison. The `isEqual` function checks if two objects or arrays are equal, taking into account their structure, properties, and values.

In this benchmark, the Lodash `isEqual` function is tested with two input objects: `j1` and `j2`. `j1` has some nested properties, including an array of color values, while `j2` has a similar structure but with different values in its `Color` array.

**Manual Equality Checking**

The manual implementation of equality checking uses JavaScript primitives like `===`, `typeof`, and `Object.keys()` to compare two objects or arrays. This approach requires more code and is generally less concise than using a library function like Lodash's `isEqual`.

In this benchmark, the manual implementation of equality checking is also tested with the same input objects: `j1` and `j2`. The manual implementation must carefully handle cases like nested properties, array values, and property order.

**Pros/Cons**

Here are some pros and cons for each approach:

Lodash `isEqual` function:
Pros:

* Concise and readable code
* Handles complex object structures and properties
* Robust performance

Cons:

* Requires an additional library dependency (Lodash)
* May have slower startup times due to the additional dependency

Manual Equality Checking:
Pros:

* No dependencies or overhead
* Can be more lightweight and efficient for simple cases
* Allows for fine-grained control over equality checking logic

Cons:

* More code required, which can lead to errors or inconsistencies
* Requires careful handling of complex cases like nested properties and array values

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: If you need optimal performance, Lodash's `isEqual` function is likely a better choice due to its optimized implementation.
* Code readability and maintainability: If code clarity is crucial, manual equality checking might be preferable, as it forces developers to carefully consider each comparison.
* Library dependencies: If you're working in an environment with strict dependencies or performance constraints, the manual approach might be more suitable.

**Alternatives**

Other alternatives for implementing equality checking include:

1. **ES6's `===` and `==` operators**: These primitive comparisons can be used to check for basic equality, but may not handle complex cases like nested properties or array values.
2. **JSON Schema validation libraries**: Libraries like jsonschema or validator.js provide more advanced equality checking capabilities, especially for validating JSON data against schemas.
3. **Other object comparison libraries**: Other libraries like compare-obj or deep-equalize offer alternative approaches to comparing objects and arrays.

These alternatives may provide different trade-offs in terms of performance, code complexity, and features, so be sure to evaluate them carefully based on your specific use case and requirements.

Related benchmarks:

lodash isEqual to manual equal (version: 0)

Compares lodash equal and manual equal performance

Comparing performance of: Lodash vs Manual

Created: 5 years ago by: Guest

Jump to the latest result

Lodash

Manual

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):