Benchmark: Testingas AngularGas

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 < 100; 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

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared options, pros and cons of each approach, library usage, and special JavaScript features.

**Benchmark Overview**

The benchmark compares two approaches for creating a deep copy of an object: `JSON.parse(JSON.stringify(MyObject))` and `angular.copy(MyObject)`. The goal is to determine which method is faster and more efficient.

**Script Preparation Code**

The script preparation code creates a large object (`MyObject`) with 100,000 properties, each containing nested objects and values. This object is then used as the input for the benchmarking test cases.

**Html Preparation Code**

The HTML preparation code includes a reference to AngularJS version 1.5.11, which is used in one of the benchmarking test cases.

**Benchmarking Test Cases**

There are two test cases:

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

**Options Compared**

The two options being compared are:

1. **JSON-based deep copy**: Using `JSON.parse(JSON.stringify(MyObject))` to create a deep copy of the object.
2. **Angular-based deep copy**: Using `angular.copy(MyObject)` to create a deep copy of the object.

**Pros and Cons of Each Approach**

**JSON-based Deep Copy:**

Pros:

* Widely supported by most JavaScript engines
* Simple to implement

Cons:

* Can be slower due to the overhead of parsing JSON strings
* May not work correctly with complex objects or arrays containing circular references

**Angular-Based Deep Copy:**

Pros:

* Optimized for performance and correctness in AngularJS applications
* Works well with complex objects and arrays, including those with circular references

Cons:

* Requires AngularJS to be loaded
* May require more code and setup than the JSON-based approach

**Library Usage**

The `angular.copy()` method is part of the AngularJS library. It provides an optimized implementation for creating deep copies of objects in Angular applications.

**Special JavaScript Features**

None are mentioned in this benchmark, but it's worth noting that some other approaches might use features like:

* `Object.assign()`: A modern approach to object assignment
* `Array.prototype.slice()`: Creating a shallow copy of arrays using slicing

However, these approaches are not used in this specific benchmark.

**Other Alternatives**

If you need to create deep copies of objects in JavaScript, here are some alternative approaches:

1. **Lodash's `_.cloneDeep()`**: A popular library for utility functions, including deep cloning.
2. **Memento.js**: A lightweight library for creating and managing object clones.
3. ** manual approach using `Object.assign()` and array slicing**: Creating a shallow copy of an array or object using these methods.

Keep in mind that the choice of approach depends on your specific requirements, performance needs, and personal preference.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/75.0.3770.90 Chrome/75.0.3770.90 Safari/537.36

Browser/OS: Chromium 75 on Ubuntu

View result in a separate tab

Test name	Executions per second
myCopy = JSON.parse(JSON.stringify(MyObject))	2969.2 Ops/sec
myCopy = angular.copy(MyObject)	3523.0 Ops/sec

Related benchmarks:

Testingas AngularGas (version: 0)

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

Created: 5 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>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):