Benchmark: Tattii - MeasureThat.net

Script Preparation code:

var firstObject = { sampleData: 'Hello world' }
var secondObject = { moreData: 'foo bar' }

Tests:

Using the spread operator
const finalObject = { ...firstObject, moreData: 'foo bar' };
Using Object.assign
const finalObject = Object.assign(firstObject, { moreData: 'foo bar' });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using the spread operator
Using Object.assign

Fastest: N/A

Slowest: N/A

Latest run results:

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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 what's being tested in this benchmark.

**Benchmark Definition**

The benchmark is defined by a JSON object that includes the script preparation code, HTML preparation code (which is empty in this case), and a description (which is null). The script preparation code defines two objects: `firstObject` with sample data "Hello world" and `secondObject` with additional data "foo bar".

**Test Cases**

There are two test cases:

1. **Using the spread operator**: This test case creates a new object `finalObject` by spreading the properties of `firstObject` into it, and then adds more data using the spread operator again.
2. **Using Object.assign**: This test case uses the `Object.assign()` method to merge the properties of `firstObject` with additional data.

**What's being compared**

In this benchmark, two approaches are being compared:

1. Using the spread operator (`...`) to create a new object and add data.
2. Using `Object.assign()` to merge objects.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Using the spread operator**:
	+ Pros:
		- More concise and expressive code
		- Easier to read and maintain
		- Can be used with modern JavaScript features like rest parameters and destructuring
	+ Cons:
		- May not be supported in older browsers or environments
		- Can lead to slower performance due to the overhead of creating a new object
* **Using Object.assign()**:
	+ Pros:
		- More widely supported across browsers and environments
		- Can be faster than using the spread operator due to its optimized implementation
	+ Cons:
		- Less concise and expressive code
		- May require more lines of code to achieve the same result

**Library usage**

Neither test case uses a specific library, as it's focused on comparing two built-in JavaScript features.

**Special JS feature or syntax**

There are no special JS features or syntaxes being used in this benchmark. Both tests only use standard JavaScript features and syntax.

**Other alternatives**

If you were to rewrite these tests using alternative approaches, here are some options:

* Instead of the spread operator, you could use `Object.create()` to create a new object and add data.
* Alternatively, you could use destructuring assignment to extract properties from one object and assign them to another.
* For `Object.assign()`, you could use other methods like `Array.prototype.reduce()` or `String.prototype.repeat()` to merge objects.

However, these alternatives might not be as concise or readable as the original tests, so it's worth sticking with the spread operator and Object.assign() if possible.

Related benchmarks:

Tattii (version: 0)

Comparing performance of: Using the spread operator vs Using Object.assign

Created: 2 years ago by: Guest

Jump to the latest result

Using the spread operator

Using Object.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):