Benchmark: Object.keys() vs _.key()

HTML Preparation code:

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

Tests:

Object.prototype
const obj = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7, h: 8, i: 9, j: 10 }; const keys = Object.keys(obj);
Lodash
const obj = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7, h: 8, i: 9, j: 10 }; const keys = _.keys(obj);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.prototype
Lodash

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

**Benchmark Explanation**

The provided benchmark measures the performance difference between two approaches to get an array of keys from an object: `Object.keys()` (built-in JavaScript method) and `_keys()` (a function from the Lodash library).

**Comparison Options**

There are two options being compared:

1. **`Object.keys()`**: This is a built-in JavaScript method that returns an array of strings containing all the properties found directly in an object.
2. **`_.keys(obj)`**: This uses the `keys()` function from the Lodash library, which also returns an array of keys.

**Pros and Cons**

* **`Object.keys()`**:
	+ Pros: Native JavaScript method, no additional dependencies required.
	+ Cons: May have performance overhead due to the need to iterate over the object's properties.
* **`_.keys(obj)`**:
	+ Pros: Often faster than `Object.keys()` since it uses an optimized implementation under the hood. Also provides more features and flexibility (e.g., filtering, sorting).
	+ Cons: Requires including Lodash in the project, which may add unnecessary dependencies.

**Lodash Library**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and functional programming. The `_keys()` function is one of its many utility functions, designed to provide a concise way to get an array of keys from an object.

**Special JS Feature or Syntax**

None mentioned in this benchmark.

**Other Alternatives**

For getting an array of keys from an object, other alternatives might include:

1. **`for...in` loop**: This can be used with the `Object.keys()` method or as a standalone approach: `const keys = []; for (const key in obj) { if (obj.hasOwnProperty(key)) { keys.push(key); } }`
2. **`Array.prototype.slice()` and `Object.keys()` combination**: `const keys = Object.keys(obj).slice()`

Keep in mind that the performance differences between these alternatives might be negligible unless performance is a critical concern for your specific use case.

**Benchmark Results**

The latest benchmark results show that `Object.keys()` outperforms `_keys()` by approximately 10% on this particular test case. However, it's essential to note that the performance difference may vary depending on the specific object structure and other factors affecting benchmark results.

Related benchmarks:

Object.keys() vs _.key() (version: 0)

Comparing performance of: Object.prototype vs Lodash

Created: 7 years ago by: Registered User

Jump to the latest result

Object.prototype

Lodash

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):