Benchmark: javascript new vs Object.create

Script Preparation code:

//var opt = {}

function Foo() {}

var Bar = {};

Tests:

Object.create
let bar = Object.create(Bar);
new
let foo = new Foo();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.create
new

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser/OS: Chrome 143 on Windows

View result in a separate tab

Test name	Executions per second
Object.create	97474504.0 Ops/sec
new	89402632.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its results.

**Benchmark Overview**

The test compares two JavaScript syntax approaches to create an object: `new` (with classes) and `Object.create`. The goal is to measure their performance.

**Options Compared**

Two options are being compared:

1. **New**: This approach uses the `new` keyword with a class constructor (`Foo`) to create a new instance of the `Bar` object. The syntax is `let foo = new Foo();`.
2. **Object.create**: This approach uses the `Object.create()` method, passing an existing object (`Bar`) as its first argument. The syntax is `let bar = Object.create(Bar);`.

**Pros and Cons**

*   **New:**
    *   Pros:
        *   More modern, standardized way of creating objects with classes.
        *   Less boilerplate code required.
    *   Cons:
        *   Requires support for ES6+ syntax (classes).
        *   Potential performance overhead due to class instantiation.
*   **Object.create**:
    *   Pros:
        *   Older syntax that is still widely supported across browsers.
        *   No performance overhead from class instantiation.
    *   Cons:
        *   Less modern and less standardized than the `new` approach.

**Library and Purpose**

The `Foo` constructor function is used to create a simple object. In this context, its purpose is only to demonstrate the creation of an object using the `new` keyword. The actual functionality of `Foo` is not being tested or compared; it's just a utility for creating objects with classes.

**Special JS Feature/Syntax**

Neither the `new` nor the `Object.create` approaches require special JavaScript features or syntax beyond standard ES6+ and older syntax support. They are both relatively straightforward in terms of required language features.

**Other Alternatives**

Some other alternatives to create an object include:

*   Function constructor: `let bar = new Bar();`
*   Constructor functions (before classes): `Bar.prototype.bar = function(){}; let bar = new Bar();`
*   Immediately Invoked Function Expression (IIFE) with a function that returns an object: `(function(){return {}})()`

Related benchmarks:

javascript new vs Object.create (version: 0)

Comparing performance of: Object.create vs new

Created: 2 years ago by: Guest

Jump to the latest result

Object.create

new

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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