Benchmark: spread operator vs object assign vs object setPrototypeOf vs reflect setPrototypeOf

spread operator vs object assign vs object setPrototypeOf vs reflect setPrototypeOf (version: 1)

spread operator vs object assign vs object setPrototypeOf vs reflect setPrototypeOf

Comparing performance of: spread vs assign vs assign null vs Object setPrototypeOf vs Object setPrototypeOf null vs Reflect setPrototypeOf vs Reflect setPrototypeOf null

Created: one year ago by: Registered User

Jump to the latest result

HTML Preparation code:

spred vs object assign vs object setPrototypeOf vs reflect setPrototypeOf

Script Preparation code:

window.data = Array.from({ length: 65535 }, (_, index) => index);

Tests:

spread
var spread = { ...window.data };
assign
var assign = Object.assign({}, window.data);
assign null
var assignNull = Object.assign(Object.create(null), window.data);
Object setPrototypeOf
var objectSetPrototypeOf = Object.setPrototypeOf({}, window.data);
Object setPrototypeOf null
var objectSetPrototypeOfNull = Object.setPrototypeOf(Object.create(null), window.data);
Reflect setPrototypeOf
var reflectSetPrototypeOf = Object.setPrototypeOf({}, window.data);
Reflect setPrototypeOf null
var reflectSetPrototypeOfNull = Object.setPrototypeOf(Object.create(null), window.data);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
assign
assign null
Object setPrototypeOf
Object setPrototypeOf null
Reflect setPrototypeOf
Reflect setPrototypeOf null

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Linux

View result in a separate tab

Test name	Executions per second
spread	98.1 Ops/sec
assign	94.1 Ops/sec
assign null	104.3 Ops/sec
Object setPrototypeOf	3955041.8 Ops/sec
Object setPrototypeOf null	2463769.5 Ops/sec
Reflect setPrototypeOf	3549593.2 Ops/sec
Reflect setPrototypeOf null	2323514.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared options, pros and cons of each approach, and other considerations.

**Benchmark Purpose:**
The MeasureThat.net benchmark is designed to compare the performance of different ways to create and set the prototype chain of an object in JavaScript. The goal is to determine which method is the fastest for creating objects with large amounts of data.

**Options Compared:**

1. **Spread Operator (`{ ...window.data }`)**: This option uses the spread operator to create a new object with the same properties as `window.data`.
2. **Object Assign (`var assign = Object.assign({}, window.data);`)**: This option uses `Object.assign()` to copy all enumerable own properties from `window.data` to a new object.
3. **Object SetPrototypeOf (`var objectSetPrototypeOf = Object.setPrototypeOf({}, window.data);`)**: This option sets the prototype chain of an object created with `Object.create(null)` to point to `window.data`.
4. **Reflect SetPrototypeOf (`var reflectSetPrototypeOf = Object.setPrototypeOf({}, window.data);`)**: This option uses the `Object.setPrototypeOf()` method with the `Reflect` namespace to set the prototype chain of an object created with `Object.create(null)` to point to `window.data`.

**Pros and Cons of Each Approach:**

* **Spread Operator (`{ ...window.data }`)**:
	+ Pros: Fast, concise, and widely supported.
	+ Cons: May not work as expected if `window.data` has non-enumerable properties.
* **Object Assign (`var assign = Object.assign({}, window.data);`)**:
	+ Pros: Works with all enumerable own properties, but may be slower due to the extra function call.
	+ Cons: Can be less readable and more verbose than the spread operator.
* **Object SetPrototypeOf (`var objectSetPrototypeOf = Object.setPrototypeOf({}, window.data);`)**:
	+ Pros: Fast and efficient way to set the prototype chain.
	+ Cons: Requires understanding of `Object.create()` and `setPrototypeOf()`, and may not work as expected if `window.data` has non-enumerable properties.
* **Reflect SetPrototypeOf (`var reflectSetPrototypeOf = Object.setPrototypeOf({}, window.data);`)**:
	+ Pros: Similar to `Object.setPrototypeOf()`, but with a more modern API.
	+ Cons: Requires understanding of the `Reflect` namespace and may not work as expected if `window.data` has non-enumerable properties.

**Library Used:** None

**Special JS Feature/ Syntax:** The benchmark uses a special JavaScript feature called "Object.create()". This method creates a new object with the specified prototype, allowing you to customize the inheritance chain of an object. It's a low-level API that requires manual management of prototypes, but can be useful in certain scenarios.

**Other Considerations:**

* Performance: The benchmark is designed to measure performance differences between these methods.
* Readability and Maintainability: Some options (e.g., Object Assign) may require more code and be less readable than others (e.g., Spread Operator).
* Browser Support: The benchmark results may vary across different browsers, as each has its own implementation of the compared methods.

**Alternative Approaches:** Other approaches to create objects with large amounts of data could include:

* Using a library like Lodash or underscore.js, which provide optimized implementations for these tasks.
* Utilizing modern JavaScript features like template literals or async/await to simplify object creation and manipulation.
* Implementing custom solutions using Web Workers or other parallel processing techniques.

Keep in mind that the benchmark's results may not be representative of all use cases, and the best approach will depend on the specific requirements and constraints of your project.

Related benchmarks:

spread operator vs object assign vs object setPrototypeOf vs reflect setPrototypeOf (version: 1)

spread operator vs object assign vs object setPrototypeOf vs reflect setPrototypeOf

Comparing performance of: spread vs assign vs assign null vs Object setPrototypeOf vs Object setPrototypeOf null vs Reflect setPrototypeOf vs Reflect setPrototypeOf null

Created: one year ago by: Registered User

Jump to the latest result

spread

assign

assign null

Object setPrototypeOf

Object setPrototypeOf null

Reflect setPrototypeOf

Reflect setPrototypeOf null

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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