Benchmark: Lodash and native variable exist checking

HTML Preparation code:

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

Script Preparation code:

myObj = {
    "name":"John",
    "age":30,
    "cars": {
        "car1":"Ford",
        "car2":"BMW",
        "car3":"Fiat"
    }
 }

Tests:

get variable with native checking
if (myObj && myObj.age && myObj.age.car1) { const foo = myObj.age.car1; }
get variable from object using lodash get
const foo = _.get(myObj, 'cars.car1');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
get variable with native checking
get variable from object using lodash get

Fastest: N/A

Slowest: N/A

Latest run results:

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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's being tested, compared, and discussed.

**Benchmark Definition**

The benchmark definition is a JSON object that provides information about the test case. In this case, we have two test cases:

1. **Test Case 1: "get variable with native checking"**
This test checks how JavaScript performs variable existence checks using the `&&` operator. Specifically, it checks if `myObj.age.car1` exists.

2. **Test Case 2: "get variable from object using lodash get"**
This test uses the Lodash library to check how it performs variable existence checks and retrieval using its `_.get()` function.

**Options Compared**

We have two main options being compared:

1. **Native JavaScript variable existence checks**: Using the `&&` operator to check if a variable exists before attempting to access it.
2. **Lodash `_.get()` function**: A utility function provided by Lodash that allows you to safely navigate through nested objects.

**Pros and Cons**

### Native JavaScript Variable Existence Checks

Pros:

* Typically faster, as it avoids the overhead of calling a library function.
* More concise and readable code.

Cons:

* May cause errors if the variable doesn't exist, resulting in unexpected behavior or exceptions.

### Lodash `_.get()` Function

Pros:

* Provides a safer way to access nested objects, avoiding potential null pointer exceptions or undefined values.
* Can be more readable, especially when dealing with complex object structures.

Cons:

* Typically slower than native checks, due to the overhead of calling a library function.
* May add unnecessary complexity to code.

**Other Considerations**

When evaluating these options, consider the following factors:

* Performance: If speed is critical, native JavaScript variable existence checks might be preferred. However, if safety and readability are more important, Lodash `_.get()` might be a better choice.
* Code Readability: When working with complex object structures, using `_.get()` can make code more readable and maintainable.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, object iteration, and more. The `_.get()` function is specifically designed to safely navigate through nested objects, providing a convenient way to access properties without worrying about null pointer exceptions or undefined values.

**Special JS Feature/Syntax**

There isn't any special JavaScript feature or syntax being used in these benchmarks. However, if you're interested in exploring other advanced features like async/await or ES6 classes, we can discuss those topics as well!

**Other Alternatives**

If you're looking for alternative libraries or approaches to Lodash `_.get()`, consider the following options:

* **Native JavaScript Object Prototypes**: You can implement similar functionality using JavaScript object prototypes and the `in` operator.
* **Alternative Utility Libraries**: Other popular utility libraries like Moment.js, jQuery, or even vanilla JavaScript's built-in functions (e.g., `Object.keys()`, `Array.prototype.find()`) might provide alternative solutions for safely navigating objects.

Keep in mind that each library or approach has its own strengths and weaknesses, and the choice ultimately depends on your specific use case and performance requirements.

Related benchmarks:

Lodash and native variable exist checking (version: 0)

Comparing performance of: get variable with native checking vs get variable from object using lodash get

Created: 7 years ago by: Guest

Jump to the latest result

get variable with native checking

get variable from object using lodash get

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):