Benchmark: Lodash.get vs Property dot notation nested vs optional chaining

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var person = {name: 'Frederick', lastName: 'Corcino Alejo', details: {eyes: 'brown'}};

Tests:

Lodash get
_.get(person, 'details.eyes');
Native naive
person.details.eyes
Guarded native
person && person.details && person.details.eyes
Optional chaining
person?.details?.eyes

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash get
Native naive
Guarded native
Optional chaining

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 break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition:**

The benchmark tests four different ways to access the `eyes` property of an object within an object:

1. **Lodash `.get()`**: Using Lodash's `_.get()` method to safely navigate the nested object.
2. **Property dot notation nested**: Accessing the property using dot notation (`person.details.eyes`).
3. **Optional chaining**: Using the optional chaining operator (`?.`) to access the property.

**Script Preparation Code:**

The script defines a simple JavaScript object `person` with nested properties:
```javascript
var person = {name: 'Frederick', lastName: 'Corcino Alejo', details: {eyes: 'brown'}}
```
This object is used as the test subject for all benchmark cases.

**Html Preparation Code:**

The HTML code includes a script tag that loads Lodash version 4.16.0 from a CDN:
```html
<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>
```
This ensures that the Lodash library is available for the benchmark cases.

**Individual Test Cases:**

The test cases are as follows:

1. **Lodash `.get()`**: `_.get(person, 'details.eyes');`
2. **Native naive**: `person.details.eyes`
3. **Guarded native**: `person && person.details && person.details.eyes`
4. **Optional chaining**: `person?.details?.eyes`

**Library:**

* Lodash is a popular JavaScript utility library that provides various functions for tasks such as string manipulation, array operations, and object manipulation.

**Special JS Feature/Syntax:**

* Optional chaining (`?.`) was introduced in ECMAScript 2020 (ES11) as a new way to access nested properties safely. It allows you to avoid null pointer exceptions by only accessing the property if it exists.
* The `&&` operator with guard checks is also used in some older JavaScript implementations, but it's not as safe or expressive as optional chaining.

**Pros and Cons:**

1. **Lodash `.get()`**: Pros:
	+ Provides a safe way to access nested properties.
	* Cons:
		+ Adds extra overhead due to the function call.
		+ May be slower than native approaches.
2. **Property dot notation nested**: Pros:
	* Fast and efficient (no function call or overhead).
	* Easy to read and understand.
	* Cons:
		+ Can throw null pointer exceptions if any of the properties don't exist.
3. **Optional chaining**: Pros:
	+ Provides a safe way to access nested properties while avoiding null pointer exceptions.
	+ More expressive and concise than guard checks.
	* Cons:
		+ May be slower than native approaches due to the optional operator (`?.`).
4. **Guarded native**: Pros:
	* Fast and efficient (no function call or overhead).
	* Easy to read and understand.
	* Cons:
		+ Requires careful handling of null and undefined values.

**Other Alternatives:**

If you want to avoid using Lodash, you can implement a similar function using plain JavaScript:
```javascript
function getNestedProperty(obj, path) {
  const parts = path.split('.');
  let currentObj = obj;
  for (const part of parts) {
    if (!currentObj[part]) return undefined;
    currentObj = currentObj[part];
  }
  return currentObj;
}
```
This function uses a loop to navigate the object graph and returns the value of the nested property. However, it doesn't provide the same level of safety or expressiveness as Lodash's `_.get()` method.

Keep in mind that this benchmark is specific to the JavaScript engine used by MeasureThat.net and may not be representative of all browsers or environments.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36

Browser/OS: Chrome 91 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash get	2749172.5 Ops/sec
Native naive	17685442.0 Ops/sec
Guarded native	5978992.5 Ops/sec
Optional chaining	17589200.0 Ops/sec

Related benchmarks:

Lodash.get vs Property dot notation nested vs optional chaining (version: 0)

Comparing performance of: Lodash get vs Native naive vs Guarded native vs Optional chaining

Created: 3 years ago by: Guest

Jump to the latest result

Lodash get

Native naive

Guarded native

Optional chaining

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):