Benchmark: object create null db fork

Tests:

object create null
var a = []; for (i = 0; i < 10000; i++) a.push( Object.create(null) )
object
var a = []; for (i = 0; i < 10000; i++) a.push( {} );
new
var a = []; for (i = 0; i < 10000; i++) a.push( new Object() );
Obj.create no null
var a = []; const obj = {} for (i = 0; i < 10000; i++) a.push( Object.create(obj) )

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object create null
object
new
Obj.create no null

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
object create null	2689.1 Ops/sec
object	4003.4 Ops/sec
new	3237.9 Ops/sec
Obj.create no null	2799.5 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):

LLMs can make mistakes. Check important info.

The provided benchmark tests the performance of different methods for creating objects in JavaScript. Specifically, it compares four distinct approaches to object creation, analyzing how efficiently each method can execute the task in a loop, where 10,000 objects are created and added to an array.

### Test Cases and Options Compared

1. **`Object.create(null)`**
   - **Test Name:** `object create null`
   - **Description:** This method creates a new object with no prototype (`null` as the prototype). This results in an object that is free of inherited properties and methods, which can enhance performance and security when no prototype functionalities are needed.
   - **Pros:** Cleaner object with no prototype chain, which can reduce lookup time for properties.
   - **Cons:** Lacks utility methods like `toString` or `hasOwnProperty`, limiting its functionality.

2. **`{}` (Object literal)**
   - **Test Name:** `object`
   - **Description:** This is the standard way of creating an object in JavaScript using an object literal. It results in an object with the standard prototype (from `Object`).
   - **Pros:** Easy to write and intuitive; provides built-in methods inherited from `Object.prototype`.
   - **Cons:** Slightly slower than creating objects without a prototype due to inheritance lookups.

3. **`new Object()`**
   - **Test Name:** `new`
   - **Description:** This method uses the `Object` constructor to create a new object. It behaves like the object literal method in terms of prototype.
   - **Pros:** Similar to the object literal regarding functionality and built-in methods.
   - **Cons:** Generally less preferred due to verbosity. Performance can be suboptimal compared to other methods demonstrated.

4. **`Object.create(obj)`**
   - **Test Name:** `Obj.create no null`
   - **Description:** This method creates a new object using the specified prototype object (`obj`). In this case, a previously created empty object is passed as the prototype.
   - **Pros:** Allows the creation of objects while leveraging an existing object as a prototype. Useful for creating objects with shared properties.
   - **Cons:** If performance is your only concern, it could be slower than using `Object.create(null)` as it still inherits from another object.

### Benchmark Results

The benchmark results provide the number of executions per second for each method, indicating the performance efficiency:

- **`object` (Object literal):** 4003.41 executions/sec
- **`new` (using `new Object()`):** 3237.89 executions/sec
- **`Obj.create no null`:** 2799.52 executions/sec
- **`object create null`:** 2689.13 executions/sec

### Key Observations

- The object literal method (`{}`) performed the best among the options, likely due to its optimized implementation in modern JavaScript engines.
- Creating objects without a prototype (`Object.create(null)`) was the slowest, although it can provide more advantage in specific use cases (like key-value storage without prototype interference).
- Using `new Object()` was less efficient than both object literal and `Object.create(null)`, but not dramatically so.

### Other Considerations and Alternatives

While this benchmark provides insight into various object creation methods in JavaScript, other alternatives exist depending on the application:

- **Factory Functions:** Instead of creating objects directly, you could create a function that returns a new object. This approach can encapsulate object creation logic and provide a flexible way to create similar objects.
  
- **ES6 Classes:** Using `class` syntax might contribute to cleaner and more maintainable code. However, it may not be the absolute fastest method for performance-sensitive use cases.
  
- **Prototypical Inheritance:** Consideration for when to use prototypical inheritance (`Object.create(...)`) versus class-based inheritance based on the design requirements of the application.

In summary, while the choice of object creation in JavaScript can affect performance, it should also consider readability, maintainability, and the specific requirements of the application.

Related benchmarks:

object create null db fork (version: 1)

Comparing performance of: object create null vs object vs new vs Obj.create no null

Created: 2 months ago by: Guest

Jump to the latest result

object create null

object

new

Obj.create no null

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):