Benchmark: spread vs assign 34134093240321490

Tests:

object spread
var params = { b:"hello", c: true, d:7 }; params = { ...params, a: 2 };
object assign
var params = { b:"hello", c: true, d:7 }; Object.assign(params, { a: 2});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object spread
object assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0

Browser/OS: Firefox 75 on Ubuntu

View result in a separate tab

Test name	Executions per second
object spread	3711558.8 Ops/sec
object assign	6687649.0 Ops/sec

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

LLMs can make mistakes. Check important info.

The provided JSON represents a JavaScript benchmark test case on the MeasureThat.net website. The goal of this benchmark is to compare two approaches for updating an object in JavaScript: using the spread operator (`...`) and using the `Object.assign()` method.

**What are being compared?**

Two options are being compared:

1. **Object Spread**: This approach uses the spread operator (`...`) to create a new object with the updated properties.
2. **Object Assign**: This approach uses the `Object.assign()` method to update the existing object with new properties.

**Pros and Cons of each approach:**

* **Object Spread**:
	+ Pros:
		- More readable and concise code
		- Does not require a library or built-in function (native JavaScript)
	+ Cons:
		- May be slower due to the overhead of creating a new object
		- Limited browser support (prior to ECMAScript 2015, some versions of Internet Explorer did not support it)
* **Object Assign**:
	+ Pros:
		- More efficient in terms of performance (faster execution time)
		- Better supported by older browsers and versions of JavaScript
	+ Cons:
		- Less readable and less concise code compared to object spread
		- Requires a library or built-in function (`Object.assign()`)

**Library usage:**

Neither of the approaches requires any external libraries.

**Special JS features/syntax:**

None mentioned in the benchmark definition.

**Other considerations:**

When choosing between these two approaches, consider your specific use case and performance requirements. If readability and conciseness are more important than raw speed, object spread might be a better choice. However, if you need to support older browsers or require maximum performance, object assign could be a better option.

If you're interested in exploring other alternatives, you can consider:

* **Object Destructuring**: This approach uses destructuring syntax to extract properties from an object and assign them to new variables.
* **Prototype Chain**: You can update the prototype chain of an object to add or override methods.
* **Function Composition**: You can create a higher-order function that takes another function as an argument, allowing you to compose functions together.

Keep in mind that these alternatives may not directly compare to the spread operator and `Object.assign()` in terms of performance and execution time.

Related benchmarks:

spread vs assign 34134093240321490 (version: 0)

Comparing performance of: object spread vs object assign

Created: 4 years ago by: Guest

Jump to the latest result

object spread

object assign

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):