Benchmark: spred test 2 - MeasureThat.net

Tests:

assign code
let res = {} Object.assign(res, {'rock':'hello', 'rock2':'hello' })
spred code
let res = {} res = {...res, 'rock': 'hello', 'rock2': 'hello'}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
assign code
spred code

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 the provided JSON and explain what's being tested.

**What is being tested?**

MeasureThat.net is testing two different ways to assign properties to an object in JavaScript:

1. **Object.assign() method**: This approach uses the `Object.assign()` method, which copies all enumerable own properties from one or more source objects to a target object.
2. **Spread operator (`...`) syntax**: This approach uses the spread operator (`...`) to create a new object and then assigns values to its properties.

**Options compared**

The benchmark compares two options:

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

**Pros and cons of each approach:**

1. **`Object.assign()` method:**
	* Pros:
		+ Wide browser support (most browsers have implemented this method)
		+ Can be used with arrays as well as objects
	* Cons:
		+ Can be slower than the spread operator for large objects
		+ May not work correctly in older browsers or environments that don't implement this method
2. **Spread operator (`...`) syntax:**
	* Pros:
		+ Generally faster and more efficient than `Object.assign()`
		+ Only available in modern browsers (Chrome 107 and later)
	* Cons:
		+ Not supported in older browsers or environments that don't implement this feature

**Library usage**

There is no library mentioned in the provided JSON.

**Special JavaScript features or syntax**

The spread operator (`...`) syntax is a relatively recent addition to JavaScript, introduced in ECMAScript 2018 (ES2018). It allows you to create new objects by spreading properties from an existing object.

**Other considerations:**

When choosing between `Object.assign()` and the spread operator, consider the following factors:

* Browser support: If you need to support older browsers, use `Object.assign()`.
* Performance: Use the spread operator if you need a performance boost for large objects.
* Code readability: The spread operator can make code more readable by explicitly showing the object creation process.

**Alternative approaches**

Other ways to assign properties to an object include:

* Using bracket notation (`obj['property'] = 'value'`)
* Using the `Object.defineProperty()` method
* Creating a new object using the `new` keyword and then assigning values using dot notation (`const obj = {}; obj.property = 'value';`)

Related benchmarks:

spred test 2 (version: 0)

jkjkjk

Comparing performance of: assign code vs spred code

Created: 3 years ago by: Guest

Jump to the latest result

assign code

spred code

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):