Benchmark: Lodash 4.17.21 isEqual vs JSON stringify

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
};

var myCopy = null;

Tests:

Lodash cloneDeep
_.isEqual(MyObject, MyObject);
Json clone
JSON.stringify(MyObject) === JSON.stringify(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Json clone

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Linux

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	7214150.5 Ops/sec
Json clone	571671.6 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON that represents the JavaScript microbenchmark on MeasureThat.net.

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `Lodash cloneDeep`: This test case measures the performance of Lodash's `isEqual` function, which checks for deep equality between two objects.
2. `Json clone`: This test case measures the performance of comparing two JSON strings using the `===` operator.

**Options Compared**

In both test cases, we have two options being compared:

* **Lodash's `isEqual` function**: This function is used to compare two objects for deep equality. It recursively checks all properties and their values to determine if they are equal.
* **JSON `===` operator**: This operator is used to compare two JSON strings. It uses a binary search algorithm to find the differences between the two strings.

**Pros and Cons**

**Lodash's `isEqual` function:**

Pros:

* Deep equality checking, which can be useful in many scenarios (e.g., data validation, comparison of complex objects).
* Can handle nested objects and arrays.
* Part of a popular library with extensive testing and optimization.

Cons:

* May have additional overhead due to the use of a separate library.
* Can be slower than a simple `===` operator for very small inputs or simple comparisons.

**JSON `===` operator:**

Pros:

* Fast and lightweight, making it suitable for many use cases where speed is crucial.
* Built-in implementation, which means no additional overhead.

Cons:

* Only checks for shallow equality (i.e., property names and values are equal).
* Can be slower than Lodash's `isEqual` function for comparing complex objects or arrays.

**Other Considerations**

The benchmark also considers the device platform, operating system, and browser version, which can affect performance due to various factors like hardware capabilities, JavaScript engine optimizations, and caching behaviors.

**Libraries Used**

In this benchmark, we have:

* Lodash.js (version 4.17.21): A popular utility library for functional programming tasks, including equality checking.
* JSON.stringify() and JSON.parse(): Built-in functions in JavaScript that convert objects to strings and vice versa.

**Special JS Features or Syntax**

None are explicitly mentioned in this benchmark, but if we were to analyze the code, we'd notice:

* The use of `var` for variable declarations is an older syntax (ES5). Modern JavaScript would likely use `let` or `const`.
* The `stringify` property on the `jayson` object is a typo; it should be `json`.

**Alternative Approaches**

Other alternatives to Lodash's `isEqual` function could include:

* Using a library like ` deep-equal` or `fast-deep-equal`
* Implementing a custom equality checking function using recursion and/or iterative approaches
* Comparing objects using a simple `===` operator (but be aware of the limitations mentioned earlier)

For the JSON comparison, other alternatives might include:

* Using a library like `json-stringify-safe` or `json-stable-stringify`
* Implementing a custom string comparison function using a binary search algorithm

Related benchmarks:

Lodash 4.17.21 isEqual vs JSON stringify (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: one year ago by: Guest

Jump to the latest result

Lodash cloneDeep

Json clone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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