Benchmark: Object.create(null)

Tests:

create object via `Object.create(null)` by 10000 times
let o for (let i = 0; i < 10000; i++) { o = Object.create(null) }
create object via `{}` by 10000 times
let o for (let i = 0; i < 10000; i++) { o = {} }
create object via `new Object()` by 10000 times
let o for (let i = 0; i < 10000; i++) { o = new Object() }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
create object via `Object.create(null)` by 10000 times
create object via `{}` by 10000 times
create object via `new Object()` by 10000 times

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 Edg/144.0.0.0

Browser/OS: Chrome 144 on Windows

View result in a separate tab

Test name	Executions per second
create object via `Object.create(null)` by 10000 times	13087.8 Ops/sec
create object via `{}` by 10000 times	422630.0 Ops/sec
create object via `new Object()` by 10000 times	152825.5 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark measures the performance of three different approaches for creating an empty object in JavaScript: `Object.create(null)`, `{}`, and `new Object()`.

**Test Cases**

The test cases compare the performance of each approach:

1. **`Object.create(null)`**: This method creates a new object without a prototype chain, which can be more efficient than other approaches.
2. **`{}`**: An empty literal object is created using curly brackets `{}`.
3. **`new Object()`**: A new instance of the `Object` constructor is called with no arguments.

**Options Compared**

The test cases compare the performance of each approach by executing them 10,000 times and measuring the execution time per second.

**Pros and Cons**

1. **`Object.create(null)`**:
	* Pros: Can be more efficient due to the lack of a prototype chain.
	* Cons: May not work in all situations where an object with a prototype is required (e.g., when using `Object.prototype.toString()` or certain libraries).
2. **`{}`**:
	* Pros: Widespread support and compatibility across different browsers and environments.
	* Cons: May be slower than other approaches due to the overhead of creating a new object with curly brackets.
3. **`new Object()`**:
	* Pros: Widely supported and compatible, but can be slower than `Object.create(null)` due to the overhead of calling the constructor.

**Library Use**

None of the test cases use any external libraries.

**Special JS Features or Syntax**

The test cases do not use any special JavaScript features or syntax. They are standard ECMAScript 5 (ES5) code.

**Other Considerations**

When choosing an approach, consider the specific requirements of your application:

* If you need to create an object with a prototype chain for compatibility reasons or to support certain libraries, `Object.create(null)` might not be the best choice.
* If you prioritize performance and don't require an object with a prototype chain, `Object.create(null)` or `{}` might be suitable options.

**Alternative Approaches**

Other approaches to create an empty object in JavaScript include:

1. **`Object.empty()`**: Some browsers (e.g., Chrome) provide an `Object.empty()` method that creates an empty object.
2. **`function () {}()`**: Creating a function without any arguments and calling it immediately can create an empty object.
3. **`{}[Symbol.for('empty')]`**: This approach uses the `Symbol` object to access an unused property on an empty object, which is not well-supported across browsers.

Keep in mind that these alternative approaches may have different performance characteristics or compatibility issues compared to the tested methods.

Related benchmarks:

Object.create(null) (version: 0)

- Object.create(null) - {} - new Object()

Comparing performance of: create object via `Object.create(null)` by 10000 times vs create object via `{}` by 10000 times vs create object via `new Object()` by 10000 times

Created: 4 years ago by: Registered User

Jump to the latest result

create object via `Object.create(null)` by 10000 times

create object via `{}` by 10000 times

create object via `new Object()` by 10000 times

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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