Benchmark: Lodash forOwn vs Native keys + forEach

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: 1,
  b: 2,
  c: 3,
}

Tests:

lodash forOwn
_.forOwn(obj, (a) => {console.log(a)});
Keys and then forEach
Object.keys(obj).forEach((a) => {console.log(a)});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash forOwn
Keys and then forEach

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.

I'll break down the benchmark definition and test cases to explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark measures two different approaches for iterating over an object's keys: using Lodash's `forOwn` method versus native JavaScript's `Object.keys()` and `forEach` methods.

**Script Preparation Code**

The script preparation code creates a simple object `obj` with three properties (`a`, `b`, and `c`) initialized with values 1, 2, and 3, respectively.

**Html Preparation Code**

The HTML preparation code includes a reference to the Lodash JavaScript library (version 4.17.5) in the `<script>` tag, which will be used by the test cases.

**Test Cases**

There are two individual test cases:

1. **Lodash forOwn**: The first test case uses Lodash's `forOwn` method to iterate over the object's keys. The `_.forOwn(obj, (a) => {console.log(a)})` expression calls a callback function with each key as an argument.
2. **Keys and then forEach**: The second test case iterates over the object's keys using native JavaScript's `Object.keys()` method and then applies the `forEach` method to print each key.

**Comparison**

The benchmark compares the execution performance of these two approaches on Firefox 81 browser, running on a desktop platform with Windows operating system. The measurements are reported in executions per second (ExecutionsPerSecond).

**Pros and Cons:**

1. **Lodash forOwn**:
	* Pros:
		+ Encapsulates the iteration logic in a reusable function.
		+ Might be more readable or maintainable, depending on the context.
	* Cons:
		+ Adds overhead due to the function call and potential Lodash library dependencies.
		+ May not perform as well as native JavaScript methods for small iterations.
2. **Keys and then forEach**:
	* Pros:
		+ Leverages native JavaScript performance for iteration.
		+ No additional dependencies or function calls, reducing overhead.
	* Cons:
		+ Requires manual key iteration logic, which might be less readable or maintainable.

**Library:**

The `lodash` library is a popular JavaScript utility library that provides various functional programming helpers. In this benchmark, it's used to implement the `forOwn` method.

**Special JS Feature/Syntax:**

None mentioned in the provided benchmark definition.

**Alternatives:**

Other approaches for iterating over object keys might include:

* Using `forEach` with a custom callback function without Lodash (as done in the second test case).
* Utilizing other libraries or frameworks that provide optimized iteration utilities.
* Implementing custom iteration logic using loops, recursion, or other techniques.

Keep in mind that this benchmark primarily compares two specific approaches and might not cover all possible use cases or optimization strategies for object key iteration.

Related benchmarks:

Lodash forOwn vs Native keys + forEach (version: 0)

Comparing performance of: lodash forOwn vs Keys and then forEach

Created: 5 years ago by: Guest

Jump to the latest result

lodash forOwn

Keys and then forEach

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):