Benchmark: Object literal vs Object.create(null) v3

Tests:

Object.create(null)
let o; for (let i = 0; i < 10000; i++) { o = Object.create(null) }
object literal
let o; for (let i = 0; i < 10000; i++) { 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.

Let's break down what's being tested in the provided JSON benchmark.

The benchmark is comparing the performance of creating non-empty objects using two different approaches:

1. **Object Literal**: This involves creating an empty object `{}` and then populating it with properties, e.g., `let o = {}; for (let i = 0; i < 10000; i++) { o['property' + i] = 'value'; }`. The goal is to measure the performance of this approach.

2. **Object.create(null)**: This involves creating an object using the `Object.create()` method with `null` as its first argument, which returns a new empty object without any prototype chain or inherited properties. This approach is often used when you need to create an object that doesn't inherit from any other object. In this benchmark, it's used in the same way as the object literal approach.

**Pros and Cons:**

* **Object Literal:**
	+ Pros:
		- Most JavaScript developers are familiar with this approach.
		- It's often considered more readable and intuitive.
	+ Cons:
		- Creating a large number of properties on an object can be slow due to the overhead of property resolution.
		- This approach may not be suitable for large datasets or complex data structures.

* **Object.create(null):**
	+ Pros:
		- Can be faster than object literals, especially when creating large numbers of objects without inherited properties.
		- Avoids the overhead of property resolution associated with object literals.
	+ Cons:
		- Less familiar to many JavaScript developers.
		- May require additional setup or handling for certain use cases.

**Other Considerations:**

* The benchmark assumes that both approaches will have similar performance characteristics, but the actual results may vary depending on specific use cases and environment.
* Using `Object.create(null)` can help avoid issues related to inherited properties, such as those caused by object prototype chains. However, it may also introduce additional complexity when working with certain libraries or frameworks.

**Library Usage:**

None of the provided benchmark test cases explicitly uses any external library or framework. The performance comparison is focused on the differences between the two approaches alone.

**Special JavaScript Features or Syntax:**

There are no notable special JavaScript features or syntax used in these benchmark test cases. They follow standard JavaScript syntax and do not utilize advanced features like async/await, promises, or modern destructuring.

**Alternatives:**

Other alternatives to creating non-empty objects using object literals or `Object.create(null)` include:

* **Array-based approach:** Create an array of objects instead of individual objects. This can be faster for large datasets.
* **Object Pooling:** Implement an object pooling mechanism where a pool of pre-allocated objects is reused throughout the application. This can reduce memory allocation overhead and improve performance.
* **Inheritance optimization:** If using inheritance, consider optimizing it by creating prototype chains or using other techniques to minimize the number of property lookups.

Keep in mind that these alternatives may require additional setup, handling, and consideration, depending on your specific use case and requirements.

Related benchmarks:

Object literal vs Object.create(null) v3 (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: Guest

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):