Benchmark: lodash.keys vs Object.keys with large object

HTML Preparation code:

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

Script Preparation code:

var value = {}
for (let i = 0; i < 99999; i++) {
    value[i.toString()] = i
}

Tests:

lodash.keys
_.keys(value)
native
Object.keys(value)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.keys
native

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the benchmark.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark that tests the performance of two approaches to iterate over an object's keys: Lodash `keys` function and native `Object.keys()` method. The test uses a large object with 100,000 entries to simulate a realistic scenario.

**Options Compared**

Two options are being compared:

1. **Lodash `keys` function**: A third-party library that provides a convenient way to get the keys of an object.
2. **Native `Object.keys()` method**: A built-in JavaScript method that returns an array of a given object's own enumerable property names.

**Pros and Cons**

* **Lodash `keys` function**:
	+ Pros: Easy to use, flexible, and widely supported.
	+ Cons: Adds an external dependency (the Lodash library), which may not be desirable in all scenarios. Additionally, it might introduce overhead due to the need for dynamic loading.
* **Native `Object.keys()` method**:
	+ Pros: Built-in, no external dependencies required, and optimized for performance.
	+ Cons: May have a steeper learning curve, especially for developers unfamiliar with native JavaScript features.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, object transformation, and more. The `keys` function is one of its many offerings, allowing you to easily iterate over an object's keys without having to manually loop through each property.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

* **Performance**: Both approaches have different performance characteristics. The native `Object.keys()` method is likely to be faster, as it's a built-in implementation optimized for performance.
* **Code Readability and Maintainability**: Lodash provides a convenient abstraction over the native JavaScript `for...in` loop or array iteration methods. However, using an external library might make your code less readable to developers unfamiliar with Lodash.

**Alternatives**

If you prefer not to use Lodash, you can also consider:

1. **Manual iteration using `for...in`**: Iterate over the object's properties using a traditional `for...in` loop.
2. **Array iteration methods (e.g., `forEach()` or `map()`)**: Convert the object's keys to an array and iterate over it using one of these methods.

Keep in mind that each alternative has its own trade-offs regarding performance, code readability, and maintainability.

Related benchmarks:

lodash.keys vs Object.keys with large object (version: 0)

Comparing performance of: lodash.keys vs native

Created: 4 years ago by: Guest

Jump to the latest result

lodash.keys

native

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):