Benchmark: Object Assign vs direkt assign

Tests:

Object assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
direct adding
const firstObject = { sampleData: 'Hello world', x:1, y:2 } const finalObject = { sampleData: firstObject.sampleData, x:3, y:4}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object assign
direct adding

Fastest: N/A

Slowest: N/A

Latest run results:

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

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I'll break down the provided benchmark definition and test cases for you.

**Benchmark Definition**

The website `MeasureThat.net` provides a simple JavaScript microbenchmarking tool. The benchmark definition is a JSON object that contains metadata about the benchmark, such as its name, description, script preparation code, and HTML preparation code (which are not used in this case).

In this specific benchmark, there are two test cases: "Object assign" and "direct adding".

**Test Cases**

The first test case, "Object assign", measures the performance of using the `Object.assign()` method to merge two objects. The benchmark definition provides a sample code snippet that demonstrates how to use `Object.assign()`:
```javascript
const firstObject = { sampleData: 'Hello world' }
const secondObject = { moreData: 'foo bar' }
const finalObject = Object.assign(firstObject, secondObject);
```
The second test case, "direct adding", measures the performance of directly assigning properties to a new object without using `Object.assign()`. The benchmark definition provides a sample code snippet that demonstrates this approach:
```javascript
const firstObject = { sampleData: 'Hello world', x:1, y:2 }
const finalObject = { sampleData: firstObject.sampleData, x:3, y:4 }
```
**Options Compared**

In this benchmark, the two options being compared are:

1. **Using `Object.assign()`**: This method is used to merge two objects into a new object.
2. **Direct assignment**: This approach involves creating a new object and assigning properties directly to it without using `Object.assign()`.

**Pros and Cons of Each Approach**

Here are some pros and cons of each approach:

* **Using `Object.assign()`**:
	+ Pros: Simplifies merging objects, reduces code duplication.
	+ Cons: May have performance overhead due to function call and object creation.
* **Direct assignment**:
	+ Pros: Can be faster since it doesn't involve a function call or object creation.
	+ Cons: Requires more code maintenance if the number of properties changes.

**Library Used**

In this benchmark, no external libraries are used. However, `Object.assign()` is a built-in JavaScript method that has been available since ECMAScript 2015 (ES6).

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition. The code snippets provided use standard JavaScript syntax.

**Alternative Approaches**

If you're interested in exploring alternative approaches to object merging, here are a few options:

1. **Lodash's `merge()` method**: This method is part of the Lodash library and provides a more concise way to merge objects.
2. **ES6 spread operator (`{ ... }`)**: This syntax allows for creating a new object with properties from an existing object.
3. **Array methods (e.g., `reduce()`, `map()`)**: These methods can be used to merge objects, but may require more code and are not as straightforward as using `Object.assign()` or direct assignment.

Keep in mind that the choice of approach depends on your specific use case and performance requirements.

Related benchmarks:

Object Assign vs direkt assign (version: 0)

Comparing performance of: Object assign vs direct adding

Created: 5 years ago by: Guest

Jump to the latest result

Object assign

direct adding

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):