Benchmark: Object literal vs Object.create(null) 2

Tests:

Object.create(null)
const a = []; for (let i = 0; i < 10000; i++) { const o = Object.create(null) o.x = 'a string' o.y = 17 o.z = { m: 'an object', n: 97 } a.push( o ) }
object literal
const a = []; for (let i = 0; i < 10000; i++) { const o = { } o.x = 'a string' o.y = 17 o.z = { m: 'an object', n: 97 } a.push( o ) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.create(null)
object literal

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**Benchmark Explanation**

The provided JSON represents two JavaScript microbenchmarks, specifically designed to compare the performance of object creation using `object literal` vs `Object.create(null)`.

**What are we testing?**

We're comparing the execution time and performance difference between creating objects using:

1. **Object Literal**: Using curly braces `{}` to create a new object, e.g., `const o = { x: 'a string', y: 17, z: { m: 'an object', n: 97 } };`
2. **Object.create(null)**: Creating an object using the `Object.create()` method with `null` as the prototype, e.g., `const o = Object.create(null); o.x = 'a string'; o.y = 17; o.z = { m: 'an object', n: 97 };`

**Options compared**

The two options being compared are:

* **Object Literal**: A straightforward and widely used approach to creating objects in JavaScript.
* **Object.create(null)**: A more lightweight approach, often used when an object doesn't need a prototype or when the first property is added dynamically.

**Pros and Cons of each approach**

* **Object Literal**:
	+ Pros: Wide support, easy to read and write, and can be used in most JavaScript contexts.
	+ Cons: May result in more overhead due to the creation of an object with no prototype, which might not be necessary for small objects or when using `Object.create()` as a fallback.
* **Object.create(null)**:
	+ Pros: Can lead to smaller footprint objects, potentially reducing memory usage and execution time.
	+ Cons: May require additional code or considerations when working with certain libraries or frameworks, as some functions rely on an object having a prototype (e.g., `toString()`).

**Library and syntax details**

In this benchmark, there are no specific libraries used. However, the use of `Object.create()` relies on a fundamental aspect of JavaScript objects: prototypes.

The test cases also don't use any special JavaScript features or syntax beyond standard language constructs.

**Alternative approaches**

If you're interested in exploring alternative object creation methods, consider:

* **ES6 classes**: Classes are another way to create objects in modern JavaScript. They provide a more explicit and structured approach to object creation.
* **Object constructors**: Objects can also be created using constructor functions, which offer more control over the initialization process.

When working with microbenchmarks like this one, it's essential to keep in mind that performance differences between these approaches might not always be significant, especially for small objects or in most modern JavaScript scenarios. However, understanding the underlying mechanics and trade-offs can help you make informed decisions about your code's design and optimization strategies.

Related benchmarks:

Object literal vs Object.create(null) 2 (version: 0)

compare performance of object creating non-empty objects using object literal vs Object.create

Comparing performance of: Object.create(null) vs object literal

Created: 3 years ago by: Registered User

Jump to the latest result

Object.create(null)

object literal

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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