Benchmark: _.isEmpty vs Object.keys.length fork

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.obj = {};

for (var i = 0, len = 100; i < len; i++) {
  obj['key' + i] = 'value' + i;
}

Tests:

_.isEmpty
_.isEmpty(window.obj);
Object.keys().length
Object.keys(window.obj).length === 0;
!window.obj
if (!window.obj || !window.obj['fr']) return;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length
!window.obj

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.

Let's break down what is being tested in this benchmark.

The test case is comparing three different approaches to check if an object is empty:

1. `_.isEmpty(window.obj)`: This uses the Lodash library, which provides a utility function called `isEmpty` that checks if an object is empty. The `window.obj` variable is created using the provided script preparation code, which initializes it with 100 properties.

2. `Object.keys(window.obj).length === 0`: This checks the length of the array returned by `Object.keys()` on the `window.obj` object. If the length is 0, it means the object has no keys and is therefore empty.

3. `!window.obj || !window.obj['fr']`: This uses a special JavaScript feature called the "logical OR operator" (||) to check if `window.obj` is falsy or if one of its properties (`'fr'`) is falsy. If either condition is true, it means the object is empty.

**Options Compared:**

* Lodash's `isEmpty` function
* Using `Object.keys()` to check the length of an object
* Using a conditional statement with logical OR operator

**Pros and Cons:**

1. **Lodash's `isEmpty` function**: Pros:
	* Provides a clear and concise way to check if an object is empty.
	* Part of a widely-used and well-maintained library.
Cons:
	* Requires including the Lodash library in the test environment, which may add overhead.
2. **Using `Object.keys()`**: Pros:
	* Does not require any additional libraries.
Cons:
	* Can be slower than using `_.isEmpty` because it involves iterating over the object's keys.
3. **Logical OR operator (`||`)**: Pros:
	* Does not require any additional libraries.
Cons:
	* May be less readable or maintainable for complex expressions.

**Other Considerations:**

* The test uses a special JavaScript feature called "property access" to check if an object has a specific property (`'fr'`). This is done using the syntax `window.obj['fr']`.
* The test also uses a "logical OR operator" (||) to combine two conditions. This is a shorthand way of writing `(condition1 || condition2)`.

**Alternatives:**

Other ways to check if an object is empty could include:

* Using the `Object.keys()` method and comparing its length to 0
* Using a recursive function to iterate over the object's properties
* Using a library like jQuery or Underscore.js, which provide similar utility functions

However, Lodash's `isEmpty` function is often considered the most concise and readable way to check if an object is empty.

Related benchmarks:

_.isEmpty vs Object.keys.length fork (version: 0)

Comparing performance of: _.isEmpty vs Object.keys().length vs !window.obj

Created: 7 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

!window.obj

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):