Benchmark: comparision - MeasureThat.net

Tests:

spread
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } let finalObject = { ...firstObject, ...secondObject };
assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } let finalObject = Object.assign({}, firstObject); finalObject = Object.assign(finalObject, secondObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
assign

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and benchmark setup to understand what is being tested.

**Benchmark Overview**

The provided benchmark compares two approaches for merging objects: using the spread operator (`...`) and `Object.assign()`. The test cases are designed to measure which approach is faster and more efficient.

**Test Case 1: "spread"**

In this test case, two objects are created:
```javascript
const firstObject = { sampleData: 'Hello world' }
const secondObject = { moreData: 'foo bar' }
let finalObject = { ...firstObject, ...secondObject }
```
The spread operator is used to merge the properties of both objects into a new object. This approach is often considered more readable and concise.

**Pros of using the spread operator:**

* More readable and concise code
* Can be less error-prone than using `Object.assign()`

**Cons of using the spread operator:**

* May not work as expected when dealing with nested objects or complex data structures

**Test Case 2: "assign"**

In this test case, two objects are created:
```javascript
const firstObject = { sampleData: 'Hello world' }
const secondObject = { moreData: 'foo bar' }
let finalObject = Object.assign({}, firstObject)
finalObject = Object.assign(finalObject, secondObject)
```
`Object.assign()` is used to merge the properties of both objects into a new object. This approach requires multiple calls to `Object.assign()`, which can be less efficient.

**Pros of using `Object.assign()`:**

* Can be more flexible when dealing with nested objects or complex data structures
* Allows for easier control over the merging process

**Cons of using `Object.assign()`:**

* More verbose and less readable code
* May require additional handling for edge cases (e.g., null or undefined values)

**Library Used:**

The `...` spread operator is a built-in JavaScript feature, but it relies on the `Object.prototype.toString()` method to determine how to merge objects. This implementation was introduced in ECMAScript 2015.

**Special JS Feature/Syntax:**

There are no special features or syntax used in these test cases beyond the use of the spread operator and `Object.assign()`.

**Other Alternatives:**

Some alternative approaches for merging objects include:

* Using a library like Lodash's `merge` function
* Using a recursive merge function (e.g., based on a JSON schema)
* Using a different data structure, such as an array or a custom object class

Keep in mind that the choice of approach ultimately depends on the specific requirements and constraints of your project.

**Benchmark Considerations:**

The benchmark results can help determine which approach is faster and more efficient for merging objects. However, it's essential to consider other factors, such as code readability, maintainability, and compatibility with different browsers or environments.

Related benchmarks:

comparision (version: 0)

summa

Comparing performance of: spread vs assign

Created: 3 years ago by: Registered User

Jump to the latest result

spread

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):