Benchmark: Object.assign vs deconstruct

Tests:

deconstruct
"use strict"; class Box { constructor(params = {}) { var { x = 0, y = 0, height = 1, width = 1 } = params; this.x = x; this.y = y; this.height = height; this.width = width; } } const b = new Box({ x:3, y: 0, height: 23, width: 1}); console.assert(b.x === 3)
Object.assign
class Box { constructor(params = {}){ this.x = 0; this.y = 0; this.height = 1; this.width = 1; Object.assign(this, params); } } const a = new Box({ x:3, y: 0, height: 23, width: 1}); console.assert(a.x === 3)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
deconstruct
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):

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Let's dive into the explanation of the provided benchmark.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches: object destructuring and `Object.assign()` in JavaScript.

**Object Destructuring**

In the first test case, "deconstruct", an object called `b` is created using a class constructor with default values for its properties. The `console.assert(b.x === 3)` statement verifies that the value of `x` is indeed 3.

The key aspect of this approach is that the object's properties are destructured from the `params` object, which is spread into the object literal (`{ x = 0, y = 0, height = 1, width = 1 }`). This allows for a more concise and expressive way to initialize objects.

**Object.assign()**

In the second test case, "Object.assign", an object called `a` is created using a class constructor that uses `Object.assign()` to merge the default values with the provided `params` object. The `console.assert(a.x === 3)` statement verifies that the value of `x` is indeed 3.

The key aspect of this approach is that `Object.assign()` is used to update the existing object (`this`) with new properties from the `params` object. This allows for a more explicit way to merge objects.

**Options Compared**

Two options are being compared:

1. **Object Destructuring**: This approach uses destructuring to initialize the object's properties, which can lead to more concise and expressive code.
2. **Object.assign()**: This approach uses `Object.assign()` to merge the default values with the provided `params` object, which can be more explicit but also slightly less readable.

**Pros and Cons**

**Object Destructuring**

Pros:

* Concise and expressive syntax
* Can lead to more efficient code

Cons:

* May not be as readable for those unfamiliar with destructuring
* Requires care when handling edge cases (e.g., what happens if `params` is null or undefined?)

**Object.assign()**

Pros:

* More explicit and controlled way to merge objects
* Can be easier to understand for those familiar with `Object.assign()` syntax

Cons:

* Less concise and expressive syntax compared to object destructuring
* May lead to slightly more boilerplate code

**Other Considerations**

* Performance: Both approaches have similar performance characteristics, but the benchmark results suggest that object destructuring might be slightly faster.
* Readability and maintainability: Object destructuring can lead to more concise and readable code, while `Object.assign()` provides a more explicit way to merge objects.

**Libraries Used**

There is no library explicitly mentioned in the benchmark. However, it's worth noting that modern JavaScript versions (ECMAScript 2015+) have built-in support for object destructuring.

**Special JS Features or Syntax**

No special features or syntax are used beyond what's typically found in standard JavaScript.

Related benchmarks:

Object.assign vs deconstruct (version: 0)

Comparing performance of: deconstruct vs Object.assign

Created: 4 years ago by: Guest

Jump to the latest result

deconstruct

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):