Benchmark: {} vs Object.create vs new Set vs new Map vs new WeakSet vs new WeakMap

Tests:

{}
let v = {}
Object.create
let v = Object.create(Object.prototype)
new Set
let v = new Set
new Map
let v = new Map
new WeakSet
let v = new WeakSet
new WeakMap
let v = new WeakMap

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
{}
Object.create
new Set
new Map
new WeakSet
new WeakMap

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript benchmarks.

**Benchmark Overview**

The provided benchmark compares the performance of six different ways to create objects in JavaScript:

1. **Empty object literal**: `let v = {}`
2. **Object.create()**: `let v = Object.create(Object.prototype)`
3. **New Set**: `let v = new Set`
4. **New Map**: `let v = new Map`
5. **New WeakSet**: `let v = new WeakSet`
6. **New WeakMap**: `let v = new WeakMap`

The goal of this benchmark is to determine which approach creates objects faster.

**Comparison Options**

Each test case uses a different method to create an object. The main differences are:

* Empty object literal: Creates an empty object using the `{}` syntax.
* Object.create(): Creates a new object and sets its prototype to `Object.prototype`.
* New Set, Map, WeakSet, and WeakMap: These methods create new instances of their respective classes.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **Empty object literal**:
	* Pros: Simple, efficient, and widely supported.
	* Cons: May not be as flexible or powerful as other approaches.
2. **Object.create()**:
	* Pros: Allows for more control over object creation and prototype inheritance.
	* Cons: May introduce unnecessary overhead due to the use of `Object.prototype`.
3. **New Set, Map, WeakSet, and WeakMap**:
	* Pros: Create new instances of their respective classes, which can be beneficial for certain use cases (e.g., Sets for unique values).
	* Cons: May incur additional overhead due to class creation and instance management.

**Library Usage**

None of the benchmark test cases explicitly use any external libraries. However, it's worth noting that `Object.create()` relies on the `Object.prototype` property, which is a built-in part of the JavaScript language.

**Special JS Features or Syntax**

There are no special JS features or syntax mentioned in the provided benchmark.

**Benchmark Results**

The latest benchmark results show that:

* The empty object literal approach (`{}`) outperforms all other approaches.
* `Object.create()` performs poorly, with significantly fewer executions per second compared to the other methods.
* The new Set, Map, WeakSet, and WeakMap approaches perform similarly to each other, with slight variations in performance.

**Alternatives**

If you need to create objects for specific use cases, here are some alternative approaches:

* For creating simple, lightweight objects: `let v = {}`
* For creating objects with a specific prototype chain: `Object.create(Object.prototype)`
* For creating sets or maps of unique values: `new Set()` or `new Map()`, respectively
* For creating weak references to objects: `WeakSet` or `WeakMap`, respectively

Keep in mind that the choice of approach ultimately depends on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Linux

View result in a separate tab

Test name	Executions per second
{}	1810994560.0 Ops/sec
Object.create	5980611.0 Ops/sec
new Set	11500093.0 Ops/sec
new Map	11252882.0 Ops/sec
new WeakSet	11204176.0 Ops/sec
new WeakMap	11149295.0 Ops/sec

Related benchmarks:

{} vs Object.create vs new Set vs new Map vs new WeakSet vs new WeakMap (version: 0)

Comparing performance of: {} vs Object.create vs new Set vs new Map vs new WeakSet vs new WeakMap

Created: one year ago by: Registered User

Jump to the latest result

{}

Object.create

new Set

new Map

new WeakSet

new WeakMap

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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