Benchmark: Destructuring assignment vs lodash

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var fullObject = {
  a: {
    b: {
      c: 'value'
    }
  }
}

var emptyObject = {}

Tests:

Destructuring assignment on full object
var { a } = fullObject || {} var { b } = a || {} var { c } = b || {}
Lodash get() on full object
var c = _.get(fullObject, 'a.b.c')
Destructuring assignment on empty object
var { a } = emptyObject || {} var { b } = a || {} var { c } = b || {}
Lodash get() on empty object
var c = _.get(emptyObject, 'a.b.c')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Destructuring assignment on full object
Lodash get() on full object
Destructuring assignment on empty object
Lodash get() on empty object

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Overview**

The provided benchmark compares two approaches for accessing nested object properties: destructuring assignment and using the `lodash.get()` function.

**Destructuring Assignment**

Destructuring assignment is a syntax feature introduced in ECMAScript 2015 (ES6). It allows you to extract values from objects into separate variables. In this benchmark, we have three test cases:

1. Accessing a nested object property on a full object (`fullObject`).
2. Accessing a nested object property on an empty object (`emptyObject`).

The `Benchmark Definition` code for these tests is:
```javascript
var { a } = fullObject || {};
var { b } = a || {};
var { c } = b || {};

// or

var { a } = emptyObject || {};
var { b } = a || {};
var { c } = b || {};
```
**Lodash.get() Function**

`lodash.get()` is a utility function from the Lodash library, which allows you to safely navigate nested objects and retrieve values. In this benchmark, we have two test cases:

1. Accessing a nested object property on a full object (`fullObject`).
2. Accessing a nested object property on an empty object (`emptyObject`).

The `Benchmark Definition` code for these tests is:
```javascript
var c = _.get(fullObject, 'a.b.c');

// or

var c = _.get(emptyObject, 'a.b.c');
```
**Comparison of Approaches**

Both approaches have their pros and cons:

**Destructuring Assignment:**

Pros:

* More concise and expressive code.
* Faster execution, as it avoids the overhead of function calls.

Cons:

* Requires ECMAScript 2015 (ES6) or later syntax support.
* May not work as expected if the object is null or undefined.

**Lodash.get() Function:**

Pros:

* Works with older JavaScript versions and browsers that don't support ES6 syntax.
* Provides a safe and explicit way to navigate nested objects.

Cons:

* Requires the Lodash library, which adds overhead and dependencies.
* May be slower due to function call overhead.

**Library (Lodash)**

`lodash.get()` is a utility function from the Lodash library, which provides a set of functional programming helpers for JavaScript. It's designed to make working with data structures like arrays, objects, and maps easier and more efficient. The `get()` function is specifically designed to safely navigate nested objects and retrieve values.

**Special JS Feature (ES6 Destructuring Assignment)**

As mentioned earlier, destructuring assignment requires ECMAScript 2015 (ES6) or later syntax support. This feature has been widely adopted in modern JavaScript development, but older browsers and versions may not support it.

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: If speed is critical, destructuring assignment might be a better choice.
* Code Readability: If code readability is more important than performance, Lodash's `get()` function might be a better option due to its explicit and safe navigation mechanism.
* Browser Support: If you need to support older browsers that don't support ES6 syntax, Lodash's `get()` function is a safer choice.

**Alternatives**

If you're looking for alternative approaches or want to explore other options, consider the following:

* **Object.hasOwn()**: Instead of using destructuring assignment or Lodash's `get()` function, you can use `object.hasOwn()` to check if an object property exists before accessing it.
* **JSON Path**: If you need to navigate nested objects in a data-driven way, JSON Path is a popular library that provides a more declarative approach to working with structured data.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser/OS: Chrome 117 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Destructuring assignment on full object	31731566.0 Ops/sec
Lodash get() on full object	5949938.0 Ops/sec
Destructuring assignment on empty object	31517576.0 Ops/sec
Lodash get() on empty object	6460631.5 Ops/sec

Related benchmarks:

Destructuring assignment vs lodash (version: 0)

Destructuring assignment vs lodash performance measure

Comparing performance of: Destructuring assignment on full object vs Lodash get() on full object vs Destructuring assignment on empty object vs Lodash get() on empty object

Created: 6 years ago by: Registered User

Jump to the latest result

Destructuring assignment on full object

Lodash get() on full object

Destructuring assignment on empty object

Lodash get() on empty object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):