Benchmark: Object Assign, Object Spread, new Instance

Tests:

spread
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({a: 2}, params)
class
class T { constructor(a, b, c, d) { this.a = a this.b = b this.c = c this.d = d } } var a = new T(2, 'hello', true, 7)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
assign
class

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.

**Overview of the Benchmark**

The provided benchmark is designed to test the performance of different approaches for creating objects in JavaScript. The benchmark consists of three individual test cases:

1. `Object Assign`: Tests the use of `Object.assign()` method to create a new object by copying an existing object's properties.
2. `Object Spread`: Tests the use of the spread operator (`...`) to create a new object by spreading the properties of an existing object.
3. `Class Creation`: Tests the performance of creating objects using a class constructor.

**Options Compared**

The benchmark compares three approaches:

1. **`Object.assign()`**: A method that creates a new object by copying an existing object's properties.
2. **Spread Operator (`...`)**: A syntax feature that allows creating a new object by spreading the properties of an existing object.
3. **Class Creation**: Creating objects using a class constructor, which is a more modern approach.

**Pros and Cons**

1. **`Object.assign()`**:
	* Pros: Widely supported, easy to use.
	* Cons: May not be as efficient as other approaches, especially for large objects.
2. **Spread Operator (`...`)**:
	* Pros: Modern syntax, concise, efficient.
	* Cons: May not work in older browsers or environments that don't support the spread operator.
3. **Class Creation**:
	* Pros: More modern approach, can be more efficient than other approaches for large objects.
	* Cons: Requires defining a class constructor function, which may add overhead.

**Other Considerations**

The benchmark also considers the device platform (Desktop vs. Mobile) and operating system (Mac OS X). This is likely done to ensure that the results are representative of different environments.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition or test cases.

**Special JS Features/Syntax**

None of the test cases use special JavaScript features or syntax, other than the spread operator (`...`), which is a modern syntax feature introduced in ECMAScript 2015 (ES6).

**Alternatives**

Other alternatives for creating objects could include:

1. **Prototype chain**: Creating objects using the prototype chain, which involves setting up a prototype object and then creating new objects by inheriting from it.
2. **Array methods**: Using array methods like `Array.prototype.slice()` or `Array.prototype.map()` to create new arrays that contain the desired properties.
3. **Function constructors**: Using function constructors, such as `new Function()`, to create new objects.

However, these alternatives are not tested in this benchmark, and it is likely that they would be slower than using `Object.assign()`, spread operator (`...`), or class creation.

Related benchmarks:

Object Assign, Object Spread, new Instance (version: 0)

Comparing performance of: spread vs assign vs class

Created: 7 years ago by: Guest

Jump to the latest result

spread

assign

class

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):