Benchmark: new EmptyClass VS Object.create(EmptyClass)

HTML Preparation code:

<script>
    // Define the EmptyClass
    class EmptyClass {
        EmptyClass(a, b) {
            this.a = a;
            this.b = b;
        }
    }

    var resulting = {
        instance: null
    };
</script>

Tests:

new EmptyClass
const instance = new EmptyClass(1,2); resulting.instance = instance;
Object.create(EmptyClass);
const instance = Object.create(EmptyClass); instance.a = 1; instance.b = 2; resulting.instance = instance;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new EmptyClass
Object.create(EmptyClass);

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

Browser/OS: Firefox 135 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
new EmptyClass	186718672.0 Ops/sec
Object.create(EmptyClass);	66215348.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):

LLMs can make mistakes. Check important info.

The benchmark defined by MeasureThat.net is designed to compare two different methods of creating instances of a class in JavaScript: using the `new` keyword with a class constructor and using `Object.create()` with an existing class. Here's a breakdown of what is tested and the considerations involved.

### Benchmark Overview

#### Name
- **new EmptyClass vs Object.create(EmptyClass)**

This benchmark evaluates two approaches to instantiate a JavaScript object and measure their performance.

### Test Cases

1. **Test Name: `new EmptyClass`**
   - **Benchmark Definition**:
     ```javascript
     const instance = new EmptyClass(1,2);
     resulting.instance = instance;
     ```
   - This test uses the `new` keyword to create a new instance of `EmptyClass`, passing two parameters (`1` and `2`). It relies on JavaScript's class syntax introduced in ECMAScript 6 (ES6).

2. **Test Name: `Object.create(EmptyClass);`**
   - **Benchmark Definition**:
     ```javascript
     const instance = Object.create(EmptyClass);
     instance.a = 1;
     instance.b = 2;
     resulting.instance = instance;
     ```
   - This test uses `Object.create()` to create a new object that has its prototype set to `EmptyClass`. It manually assigns properties `a` and `b` to the newly created object.

### Pros/Cons of Approaches

- **Using `new EmptyClass`**
  - **Pros**:
    - The syntax is clean and idiomatic for creating class instances in modern JavaScript.
    - The constructor of the class (`EmptyClass`) can enforce any logic, such as property initialization and validation during instantiation.
  - **Cons**:
    - Slightly more memory-intensive due to the full instantiation and method resolution context created for the instance.
  
- **Using `Object.create(EmptyClass)`**
  - **Pros**:
    - This approach can be more lightweight as it directly creates an object without invoking a class constructor, which can be beneficial in certain scenarios (though here, we manually add properties to it).
    - Useful for creating objects based on an existing prototype and can be easier to manage in prototype-based inheritance scenarios.
  - **Cons**:
    - No constructor logic is automatically invoked; hence it requires manual assignment of properties with no enforcement or initialization, which can lead to errors if not handled carefully.
    - Less idiomatic in ES6 contexts where classes are prevalent.

### Library and Notable Features

In this benchmark, there isn’t any specific library being tested; it focuses solely on core JavaScript features. One notable feature used is the class syntax introduced in ES6, which allows for cleaner and more structured object-oriented programming compared to the traditional prototype-based approach.

### Alternative Approaches

Other alternatives to object creation in JavaScript could include:

- **Factory Functions**: Instead of classes, use functions that return objects. This is a traditional approach and provides encapsulation without the class overhead.
- **Object Literal Notation**: For simple objects, directly creating an object might suffice, enhancing performance for extremely lightweight structures.
- **ES5 Constructor Functions**: Prior to ES6, using constructor functions with the `new` keyword was standard, but it lacked many syntactic conveniences of classes.
  
### Conclusion

This benchmark is a clear examination of how different object instantiation approaches affect performance. It is particularly relevant in a context where performance is critical, and developers must choose between readability and efficiency, or between idiomatic class-based patterns and classic prototypal inheritance methods. Understanding these differences helps software engineers make informed decisions based on application needs, performance constraints, and coding style preferences.

Related benchmarks:

new EmptyClass VS Object.create(EmptyClass) (version: 1)

Comparing performance of: new EmptyClass vs Object.create(EmptyClass);

Created: 2 months ago by: Registered User

Jump to the latest result

new EmptyClass

Object.create(EmptyClass);

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):