Benchmark: class vs object create

Tests:

class
class ObjClass { constructor(name, age) { this.name = name this.age = age } getName() { return this.name } getAge() { return this.age } } const objClass = new ObjClass("john", 42) objClass.getName() objClass.getAge()
Object.create
const proto = { getName() { return this.name }, getAge() { return this.age } } let obj = Object.create(proto) obj.name = "john" obj.age = 42 obj.getName() obj.getAge()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
class
Object.create

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Test name	Executions per second
class	551620.2 Ops/sec
Object.create	656371.7 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

The provided JSON represents two test cases: "class" and "Object.create". Both tests aim to compare the performance of creating objects using different approaches:

**Class-based creation**

In the first test case, "class", we see a JavaScript class definition:
```javascript
class ObjClass {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

getName() {
    return this.name;
  }

getAge() {
    return this.age;
  }
}

const objClass = new ObjClass("john", 42);
objClass.getName();
objClass.getAge();
```
This code creates an instance of the `ObjClass` class and calls two methods on it: `getName()` and `getAge()`.

**Object.create-based creation**

In the second test case, "Object.create", we see a different approach:
```javascript
const proto = {
  getName() {
    return this.name;
  },
  getAge() {
    return this.age;
  }
}

let obj = Object.create(proto);
obj.name = "john";
obj.age = 42;
obj.getName();
obj.getAge();
```
Here, we create an object `proto` with two methods: `getName()` and `getAge()`. We then use `Object.create()` to create a new object `obj` that inherits from `proto`.

Now, let's discuss the pros and cons of these approaches:

**Class-based creation**

Pros:

* Easier to read and maintain, as classes provide a more structured way of organizing code.
* Can be more efficient in terms of performance, since class instances can share data between methods.

Cons:

* May incur overhead due to class definition and instantiation.
* Can lead to slower startup times if the class is defined and instantiated frequently.

**Object.create-based creation**

Pros:

* Provides a lightweight way to create objects with specific properties and behaviors.
* Can be useful when working with prototype-based programming or when creating complex object hierarchies.

Cons:

* May require more manual effort to set up and manage prototypes.
* Can lead to slower performance due to the overhead of prototyping and inheritance.

In terms of performance, the benchmark appears to favor `Object.create()` over class-based creation. However, this might be due to various factors, such as:

* The specific implementation of the JavaScript engine being used.
* The size and complexity of the class definitions.
* The number of method calls being executed during each test case.

The benchmark results show that `Object.create()` has a higher `ExecutionsPerSecond` value, indicating faster performance. However, it's essential to note that these results might not be representative of all scenarios and may vary depending on specific use cases.

Some additional considerations when working with JavaScript classes and object creation:

* **Inheritance**: Classes provide built-in support for inheritance, making it easier to create complex hierarchies.
* **Prototype chaining**: `Object.create()` allows you to create objects that inherit from other prototypes, enabling prototype-based programming.
* **ES6+ features**: Classes were introduced in ES6 (ECMAScript 2015) and have since become a standard feature of JavaScript. They provide a more concise way of defining classes and are supported by most modern browsers.

Other alternatives for creating objects in JavaScript include:

* **Functions as constructors**: Using functions to create objects, often with the `new` keyword.
* **Object literals**: Creating objects using literal syntax, such as `{ name: "john", age: 42 }`.
* **Array.prototype.push() and Object.assign()**: Using these methods to add properties or methods to existing objects.

However, class-based creation is generally considered a more modern and efficient approach for creating objects in JavaScript.

Related benchmarks:

class vs object create (version: 0)

Comparing performance of: class vs Object.create

Created: one year ago by: Registered User

Jump to the latest result

class

Object.create

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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