Benchmark: Object.assign vs spread operator without jquery

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.assign
spread operator

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.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark is testing two approaches: `Object.assign` and the spread operator (`...`).

**Script Preparation Code**

There is no script preparation code provided, which means that the environment for running the benchmark is not set up by the user. In a real-world scenario, this would typically involve setting up a test environment with the necessary dependencies, libraries, and configurations.

**Html Preparation Code**

There is also no html preparation code provided, which means that the UI context for running the benchmark is not set up by the user. This could include things like creating an HTML file or setting up a testing framework.

**Individual Test Cases**

The test cases are designed to compare the performance of `Object.assign` and the spread operator in two different scenarios:

1. **Test Case 1: "Object.assign"**
```javascript
var params = { b:"hello", c:true, d:7 };
var other = Object.assign({ a:2 }, params);
```
In this test case, we're creating an object `params` with some properties and then passing it to `Object.assign` along with another object `{a: 2}`. The result is assigned to the variable `other`.

2. **Test Case 2: "spread operator"**
```javascript
var params = { b:"hello", c:true, d:7 };
var other = { a:2, ...params };
```
In this test case, we're creating an object `params` with some properties and then using the spread operator (`...`) to merge its properties into another object `{a: 2}`. The result is assigned to the variable `other`.

**Library/Dependence**

Neither of these approaches relies on a specific library or dependency, so there are no additional considerations related to dependencies.

**Special JS Feature/Syntax**

Both test cases use the spread operator (`...`), which is a relatively modern feature in JavaScript. The spread operator was introduced in ECMAScript 2015 (ES6) and allows for creating new objects by merging existing objects into them. This is a common pattern in modern JavaScript development.

**Pros and Cons of Approaches**

Here are some pros and cons of each approach:

* **Object.assign**
	+ Pros: widely supported, efficient, and easy to use.
	+ Cons: can be slower than the spread operator for large datasets.
* **Spread Operator (`...`)**
	+ Pros: modern, concise, and flexible.
	+ Cons: may not be supported in older browsers or environments.

**Other Alternatives**

If you were to rewrite these test cases using different approaches, here are some alternatives:

1. **Lodash's `assign` function**: Instead of using `Object.assign`, you could use Lodash's `assign` function, which provides a similar interface.
2. **Using the `extend` method**: Another approach would be to use the `extend` method provided by some libraries or frameworks (e.g., jQuery), although this is not relevant in this specific benchmark.
3. **Manual property assignment**: Instead of using either `Object.assign` or the spread operator, you could manually assign properties to an object, e.g., `other.a = 2; other.b = 'hello';`. However, this approach would be less efficient and less concise than using one of these two methods.

Keep in mind that these alternative approaches might not provide significant performance differences between them, depending on the specific use case and requirements.

Related benchmarks:

Object.assign vs spread operator without jquery (version: 0)

Comparing performance of: Object.assign vs spread operator

Created: 7 years ago by: Registered User

Jump to the latest result

Object.assign

spread operator

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):