Benchmark: Object.assign vs spread operator 22222

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

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

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Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**
The benchmark is comparing two approaches: `Object.assign` and the spread operator (`...`). The goal is to measure which approach is faster in JavaScript.

**What is being tested?**

* Two functions are being compared:
	+ `Object.assign`: a built-in JavaScript method that copies properties from an object to another object.
	+ Spread operator (`...`): a syntax feature introduced in ECMAScript 2015 (ES6) that allows creating new objects by spreading the properties of an existing object.
* The benchmark is testing how fast each approach is when copying an object's properties into a new object.

**Options compared**

The two options being compared are:

1. `Object.assign`: uses the built-in JavaScript method to copy properties from one object to another.
2. Spread operator (`...`): uses a syntax feature to create a new object by spreading the properties of an existing object.

**Pros and Cons of each approach:**

* `Object.assign`:
	+ Pros:
		- Widely supported across different browsers and JavaScript engines.
		- Can be used with any type of objects, including arrays and functions.
	+ Cons:
		- Can be slower than the spread operator due to its method call overhead.
* Spread operator (`...`):
	+ Pros:
		- Faster than `Object.assign` since it's a syntax feature that doesn't require a method call.
		- More concise and readable code.
	+ Cons:
		- Not supported in older JavaScript engines (before ES6) or some browsers.
		- Requires more memory to create a new object.

**Library used**

None of the provided benchmark definitions use any external libraries.

**Special JS feature or syntax**

The spread operator (`...`) is a special syntax feature introduced in ECMAScript 2015 (ES6). It allows creating new objects by spreading the properties of an existing object. If you're not familiar with this syntax, don't worry; it's widely adopted and used in modern JavaScript development.

**Other alternatives**

If you wanted to test other approaches, some alternative methods could be:

* Using a library like Lodash or Ramda for object manipulation.
* Implementing a custom function for copying properties from one object to another.
* Using a different approach altogether, such as using the `JSON.parse` and `JSON.stringify` methods.

However, these alternatives are not part of the original benchmark definition and would require additional modifications to the test code.

Related benchmarks:

Object.assign vs spread operator 22222 (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):