Benchmark: Testingas AngularGas5

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.11/angular.min.js'></script>

Script Preparation code:

var MyObject = {};

// Iterate to big object 100 000 times
for (var i = 0; i < 10000; i++) {
  MyObject['prop' + i] = {
    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:

myCopy = JSON.parse(JSON.stringify(MyObject))
myCopy = JSON.parse(JSON.stringify(MyObject))
myCopy = angular.copy(MyObject)
myCopy = angular.copy(MyObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
myCopy = JSON.parse(JSON.stringify(MyObject))
myCopy = angular.copy(MyObject)

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 dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided benchmark tests two approaches for creating a copy of an object in JavaScript:

1. Using `JSON.parse(JSON.stringify(MyObject))`
2. Using `angular.copy(MyObject)`

Both methods aim to create a deep copy of the `MyObject` array, which contains nested objects.

**Options being compared**

We have two options:

A. **Deep cloning with JSON**: This method uses the `JSON.stringify()` and `JSON.parse()` functions to serialize and deserialize the object. The `JSON.stringify()` function converts an object into a string representation, which can be safely sent over a network or stored in a file. The `JSON.parse()` function does the opposite, parsing a string back into an object.

B. **Deep cloning with Angular**: This method uses the `angular.copy()` function provided by the AngularJS library to create a deep copy of the object.

**Pros and Cons**

**A. Deep cloning with JSON:**

Pros:

* Widely supported across browsers and platforms
* Can be used for both objects and arrays

Cons:

* May not work correctly with complex data structures (e.g., objects containing circular references)
* Can lead to performance issues due to excessive stringification and parsing

**B. Deep cloning with Angular:**

Pros:

* Specifically designed for creating deep copies of objects in JavaScript
* Handles circular references and other edge cases correctly
* Part of the popular AngularJS library, which is widely adopted

Cons:

* Only works with AngularJS versions 1.x (not compatible with modern Angular versions)
* Requires an additional library dependency

**Other considerations**

When using `JSON.parse(JSON.stringify(MyObject))`, it's essential to be aware that this method can fail if the object contains circular references. For example, if `MyObject` contains a property that points back to itself, the resulting copy will also contain a reference to the original object, leading to unexpected behavior.

**Library and syntax**

The `angular.copy()` function is part of the AngularJS library, which is primarily used for building single-page applications with data-driven UIs. The `JSON` functions are built-in to JavaScript and do not require any additional libraries.

**Special JS feature or syntax**

There is no special JavaScript feature or syntax involved in this benchmark. However, it's worth noting that modern JavaScript versions (ES6+) provide a more concise way of creating deep copies using the spread operator (`{ ...myObject }`).

In conclusion, the benchmark tests two approaches for creating deep copies of objects in JavaScript: using `JSON.parse(JSON.stringify(MyObject))` and `angular.copy(MyObject)`. While both methods have their pros and cons, `angular.copy()` is a more reliable choice, especially when working with complex data structures.

Related benchmarks:

Testingas AngularGas5 (version: 0)

Comparing performance of: myCopy = JSON.parse(JSON.stringify(MyObject)) vs myCopy = angular.copy(MyObject)

Created: 6 years ago by: Guest

Jump to the latest result

myCopy = JSON.parse(JSON.stringify(MyObject))

myCopy = angular.copy(MyObject)

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):