Benchmark: Lodash isEmpty vs Object.keys().length

HTML Preparation code:

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

Tests:

Lodash isEmpty
const data = {} console.log(_.isEmpty(data))
Object.keys().length
const data = {} console.log(!!Object.keys(data).length)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash isEmpty
Object.keys().length

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash isEmpty	451919.6 Ops/sec
Object.keys().length	445505.6 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what is being tested.

**Benchmark Definition**

The provided JSON object represents the overall benchmark definition, which includes:

* `Name`: The name of the benchmark, "Lodash isEmpty vs Object.keys().length".
* `Description`: An empty string, indicating that no description is provided for this benchmark.
* `Script Preparation Code` and `Html Preparation Code`: These fields are left blank, suggesting that the test scripts or HTML setup for the benchmark are already defined elsewhere.

However, upon closer inspection, we can see a reference to an external JavaScript library in the `Html Preparation Code`:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
```
This indicates that the benchmark uses Lodash, a popular JavaScript utility library.

**Test Cases**

The benchmark consists of two individual test cases:

1. **Lodash isEmpty**
```javascript
const data = {}\r\nconsole.log(_.isEmpty(data))
```
This test case creates an empty object `data` and then logs the result of calling Lodash's `isEmpty()` function on it.

2. **Object.keys().length**
```javascript
const data = {}\r\nconsole.log(!!Object.keys(data).length)
```
This test case also creates an empty object `data` and then logs a boolean value indicating whether the length of `Object.keys()` applied to `data` is truthy (i.e., non-zero).

**Options Being Compared**

The two test cases are comparing:

1. **Lodash's `isEmpty()` function**: This function takes an object as input and returns `true` if the object is empty, and `false` otherwise.
2. **`Object.keys().length`**: This expression returns a number indicating the length of the array returned by calling `Object.keys()` on the input object.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Lodash's `isEmpty()` function**:
	* Pros: Efficient and concise, as it only requires iterating over the object's properties.
	* Cons: May be slower than using `Object.keys().length` for very large objects, due to Lodash's iteration overhead.
2. **`Object.keys().length`**:
	* Pros: Simple and efficient, as it only requires a single pass through the object's keys.
	* Cons: May incur additional overhead due to string concatenation and array creation.

**Other Considerations**

When choosing between these two approaches, consider the following:

1. **Performance**: If you need to iterate over large objects frequently, Lodash's `isEmpty()` function might be a better choice. However, if the objects are relatively small, using `Object.keys().length` will likely be faster.
2. **Code readability**: The use of `Lodash.isEmpty(data)` can make the code more readable and concise, as it clearly expresses the intent of checking for an empty object.

**Alternative Approaches**

If you don't want to use Lodash or `Object.keys()` directly, here are some alternative approaches:

1. **`for...in` loop**: You could write a custom function that iterates over the object's properties using a `for...in` loop and checks for an empty array.
```javascript
function isEmpty(obj) {
  var prop = null;
  for (prop in obj) {
    if (obj.hasOwnProperty(prop)) continue; // skip inherited properties
    return false;
  }
  return true;
}
```
2. **Using a library like `is-empty`**: There are third-party libraries available that implement the `isEmpty()` function, such as `is-empty`. These libraries often provide optimized implementations and can be more efficient than Lodash.

Keep in mind that these alternative approaches may not be as concise or readable as using Lodash's `isEmpty()` function or `Object.keys().length`.

Related benchmarks:

Lodash isEmpty vs Object.keys().length (version: 0)

Comparing performance of: Lodash isEmpty vs Object.keys().length

Created: 3 years ago by: Guest

Jump to the latest result

Lodash isEmpty

Object.keys().length

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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