Benchmark: Optional chaining vs Lodash.get

HTML Preparation code:

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

Script Preparation code:

var obj = {a: {b: {c: {d: 1}}}}
var badObj = {}

Tests:

Optional Chaining
obj?.a?.b?.c?.d badObj?.a?.b?.c?.d
Lodash
_.get(obj, "a.b.c.d") _.get(badObj, "a.b.c.d", 2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Optional Chaining
Lodash

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0

Browser/OS: Chrome 143 on Windows

View result in a separate tab

Test name	Executions per second
Optional Chaining	132621976.0 Ops/sec
Lodash	6280399.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, compared options, pros and cons of those approaches, and other considerations.

**What is being tested?**

The benchmark tests two ways to access nested properties in JavaScript objects: optional chaining (`?.`) and Lodash's `_.get()` function. The test cases are designed to compare the performance of these two approaches on a specific dataset.

**Options compared:**

1. **Optional Chaining (`?.`)**: This is a new JavaScript feature introduced in ECMAScript 2020, which allows you to access nested properties without throwing an error when they don't exist.
2. **Lodash's `_.get()` function**: This is a utility function from the Lodash library that provides similar functionality to optional chaining.

**Pros and cons of each approach:**

1. **Optional Chaining (`?.`)**:
	* Pros:
		+ Simplifies code by eliminating the need for explicit null checks.
		+ More concise and readable.
	* Cons:
		+ Only supported in modern browsers (ECMAScript 2020+) and Node.js (14+).
		+ May lead to slower performance due to additional parsing and compilation steps.
2. **Lodash's `_.get()` function**:
	* Pros:
		+ Widely supported across different JavaScript environments, including older browsers and Node.js versions.
		+ Provides more control over the behavior, such as allowing a default value to be returned if the property doesn't exist.
	* Cons:
		+ Requires an additional import statement (Lodash library).
		+ May lead to slightly longer code and more complex logic.

**Library:**

In this benchmark, Lodash is used for its `_.get()` function. Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, object iteration, and more. The `_.get()` function is specifically designed to access nested properties in objects, making it a good fit for this benchmark.

**Special JS feature or syntax:**

Optional chaining (`?.`) is a new JavaScript feature introduced in ECMAScript 2020. It allows you to access nested properties without throwing an error when they don't exist. This feature has improved the readability and conciseness of JavaScript code, especially in scenarios where null or undefined values are common.

**Other alternatives:**

If you prefer not to use optional chaining (`?.`) or Lodash's `_.get()` function, other approaches include:

1. Using explicit null checks: `if (obj && obj.a && obj.a.b && obj.a.b.c) { console.log(obj.a.b.c); }`
2. Using the `in` operator: `for (var prop in obj) if (prop === 'a' && typeof obj[prop] === 'object') { if (prop === 'b' && typeof obj[prop] === 'object') { if (prop === 'c' && typeof obj[prop] === 'number') { console.log(obj[prop]); } } }`
3. Using the `hasOwnProperty()` method: `if (obj.hasOwnProperty('a') && obj.a.hasOwnProperty('b') && obj.a.b.hasOwnProperty('c')) { console.log(obj.a.b.c); }`

These alternatives may be more verbose and less readable than optional chaining (`?.`) or Lodash's `_.get()` function, but they can still get the job done.

Related benchmarks:

Optional chaining vs Lodash.get (version: 0)

Comparing performance of: Optional Chaining vs Lodash

Created: 4 years ago by: Guest

Jump to the latest result

Optional Chaining

Lodash

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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