Benchmark: Object speard vs assign

Script Preparation code:

var objA = { a: '1', b: '2' }
var objB = { c: '3', d: '4' }

Tests:

Speard
const objSpeard = { ...objA, ...objB }
Assign
const objAssign = Object.assign({}, objA, objB)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Speard
Assign

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand what's being tested in the provided JSON.

**Benchmark Definition**

The benchmark is designed to compare two approaches for creating objects with merged properties:

1. **Spread operator (Speard)**: `const objSpeard = { ...objA, ...objB }`
2. **`Object.assign()` method**: `const objAssign = Object.assign({}, objA, objB)`

**What is being tested?**

The benchmark is testing the performance difference between these two approaches on different browsers and devices.

**Options compared**

The main options being compared are:

* Spread operator (Speard)
* `Object.assign()` method

**Pros and Cons of each approach:**

1. **Spread Operator (Speard)**:
	* Pros:
		+ More concise and readable code
		+ Less error-prone, as it's harder to make mistakes when using spread operators
	* Cons:
		+ May have slower performance due to the way browsers handle object creation
2. **`Object.assign()` method**:
	* Pros:
		+ May have faster performance due to the way `Object.assign()` is optimized in modern browsers
	* Cons:
		+ More verbose code, which can make it harder to read and maintain
		+ More error-prone, as there's a chance of incorrect assignment or errors with nested objects

**Other considerations:**

The benchmark also considers other factors such as:

* Device platform (Desktop vs. unknown)
* Browser version (Chrome 67)

**Library usage**

There is no explicit library usage in the benchmark definition.

**Special JavaScript features or syntax**

No special JavaScript features or syntax are used in the benchmark.

**Other alternatives**

If you want to create objects with merged properties, there are other approaches available:

1. **Using a function**: `function createObject() { return { ...objA, ...objB }; }`
2. **Using `Object.merge()` (if available)**: `const objMerge = Object.merge({}, objA, objB);` (Note: This method is not supported in all browsers)

Keep in mind that the spread operator and `Object.assign()` method are the most widely supported and efficient ways to create objects with merged properties.

I hope this explanation helps you understand what's being tested in the benchmark!

Related benchmarks:

Object speard vs assign (version: 0)

Comparing performance of: Speard vs Assign

Created: 7 years ago by: Guest

Jump to the latest result

Speard

Assign

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):