Benchmark: Object creation speed benchmark

Script Preparation code:

var A = (function () {
    function A(b) {
        this.b = b;
    }
    return A;
}());

Tests:

new operator
new A(1);
Object.create function
Object.create(A.prototype, {a: {value: 1}});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new operator
Object.create function

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser/OS: Chrome 139 on Linux

View result in a separate tab

Test name	Executions per second
new operator	113798032.0 Ops/sec
Object.create function	2545639.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**Benchmark Definition**

The benchmark is designed to measure the speed of object creation in JavaScript using two different approaches: the `new` operator and the `Object.create()` function.

**Options being compared**

Two options are being compared:

1. **`new` operator**: This is a built-in JavaScript operator that creates a new object and returns it.
2. **`Object.create()` function**: This function creates a new object and sets its prototype to the specified object.

**Pros and Cons of each approach**

* `new` operator:
	+ Pros: Simple, concise, and widely supported.
	+ Cons: Can be slower due to the overhead of creating a new object and initializing its properties.
* `Object.create()` function:
	+ Pros: More flexible and can be used to create objects with specific prototypes or inheritance chains.
	+ Cons: Requires specifying the prototype explicitly, which can be more error-prone.

**Library usage**

There is no explicit library mentioned in the benchmark definition. However, the use of the `Object.create()` function suggests that JavaScript's built-in object creation mechanisms are being utilized.

**Special JS features or syntax**

No special JavaScript features or syntax are being used in this benchmark. The code is straightforward and uses only standard JavaScript constructs.

**Other alternatives**

In addition to the `new` operator and `Object.create()` function, other approaches could be considered for creating objects in JavaScript:

* **Constructor functions**: Using a function declaration with the same name as the object being created.
* **Prototypal inheritance**: Creating objects by extending an existing prototype using the `proto` property.

However, these alternatives are not explicitly mentioned in the benchmark definition and may not provide significant performance benefits or advantages over the `new` operator and `Object.create()` function.

**Benchmark preparation code**

The provided script preparation code creates a new object `A` with a single method `b`, which takes an argument. This is done using a self-invoking anonymous function expression, where the constructor function is defined immediately within the outer function call.

The resulting object `A` is then returned and assigned to the variable `A`.

**Individual test cases**

There are two individual test cases:

1. **`new operator`**: Creates an instance of the `A` object using the `new` operator.
2. **`Object.create()` function**: Creates a new object by specifying the prototype and properties using the `Object.create()` function.

These test cases measure the speed of creating objects using each approach.

**Latest benchmark result**

The latest benchmark results show that the Chrome 113 browser executing on a Mac OS X 10.15.7 desktop device achieved higher execution rates for both test cases, with approximately 32182120 executions per second and 3750929 executions per second respectively.

Keep in mind that these results may vary depending on the specific environment and hardware configuration used to run the benchmark.

Related benchmarks:

Object creation speed benchmark (version: 0)

Comparing performance of: new operator vs Object.create function

Created: 2 years ago by: Guest

Jump to the latest result

new operator

Object.create function

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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