Benchmark: Object.assign vs spread operator ohne 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:

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

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Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The benchmark consists of two test cases: `Object.assign` and `spread operator`. The purpose of this benchmark is to compare the performance of these two methods in assigning properties to an object.

**Options Compared**

The benchmark compares the performance of:

1. **Object.assign**: A built-in JavaScript method that assigns properties from one or more source objects to a target object.
2. **Spread Operator (`...`)**: A syntax feature introduced in ECMAScript 2015 (ES6) that allows spreading the properties of an object into another object.

**Pros and Cons**

1. **Object.assign**:
	* Pros:
		+ Widely supported across browsers and Node.js versions.
		+ Simple to use and understand.
	* Cons:
		+ Can be slower than the spread operator due to its overhead (e.g., creating a new object, checking for prototype chain).
2. **Spread Operator (`...`)**:
	* Pros:
		+ Faster than `Object.assign` since it only spreads properties without creating a new object or checking for prototypes.
		+ More concise and readable code.
	* Cons:
		+ Requires ECMAScript 2015 (ES6) support, which might not be available in older browsers or Node.js versions.

**Library Usage**

In this benchmark, no libraries are used. The test cases only rely on built-in JavaScript features.

**Special JS Feature/Syntax**

The spread operator (`...`) is a special syntax feature introduced in ECMAScript 2015 (ES6). It allows spreading the properties of an object into another object, making it more concise and expressive than traditional object assignment methods.

**Other Alternatives**

If you need to assign properties to an object without using `Object.assign` or the spread operator, you can use other methods like:

* **Array.prototype.slice()**: Creates a shallow copy of an array and assigns its elements to another object.
* **Object.create()**: Creates a new object with a specified prototype chain.
* **Array.prototype.push.apply()**/**Array.prototype.unshift.apply()**: Assigns properties from an array (or other iterable) to an object using `apply()`.

Keep in mind that these alternatives might have different performance characteristics and use cases compared to `Object.assign` and the spread operator.

Related benchmarks:

Object.assign vs spread operator ohne jquery (version: 0)

Comparing performance of: Object.assign vs spread operator

Created: 7 years ago by: Guest

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):