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

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;
Object.values().length pour Laurent
Object.values(window.obj).length === 0;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length
Object.values().length pour Laurent

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark is designed to measure the performance of three different approaches in JavaScript: `_.isEmpty` from Lodash, `Object.keys()` and `Object.values()` methods. The test creates an object with 100 properties and then checks if it's empty using each approach.

**Approaches Compared**

1. **_isEmpty(window.obj) from Lodash**: This function checks if the `window.obj` object is empty by calling the `_isEmpty` internal method of Lodash.
2. **Object.keys(window.obj).length === 0**: This approach uses the `Object.keys()` method to get an array of the object's keys and then checks if its length is zero, indicating an empty object.
3. **Object.values(window.obj).length === 0**: Similar to the previous approach, but this one uses `Object.values()` to get an array of the object's values.

**Pros and Cons**

* **_isEmpty(window.obj) from Lodash**:
	+ Pros: This approach is likely to be faster since it leverages the optimized `_isEmpty` internal method of Lodash.
	+ Cons: It requires including the entire Lodash library, which might add unnecessary overhead for small benchmarks like this one.
* **Object.keys(window.obj).length === 0**: This approach is:
	+ Pros: It's a standard JavaScript method and doesn't require any additional libraries.
	+ Cons: It can be slower than `_isEmpty` since it involves an array creation step.
* **Object.values(window.obj).length === 0**:
	+ Pros: Similar to `Object.keys()`, this approach is also a standard JavaScript method without requiring any additional libraries.
	+ Cons: Like `Object.keys()`, it might be slower due to the array creation step.

**Library and Purpose**

Lodash is a popular utility library for JavaScript that provides a lot of useful functions, including `_isEmpty`. In this benchmark, Lodash is used to provide the `_isEmpty` function, which is optimized for performance.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes mentioned in the provided code. The focus is solely on comparing different approaches to check if an object is empty.

**Other Alternatives**

If you want to compare these approaches without using Lodash, you can implement a custom `_isEmpty` function that checks the object's length and properties:

```javascript
function _isEmpty(obj) {
  return Object.keys(obj).length === 0;
}
```

You can also use other libraries or libraries like `lodash-es`, which is a subset of Lodash without the deprecated methods.

**Benchmark Preparation Code**

The provided `Script Preparation Code` sets up an object with 100 properties and assigns values to them using a loop. The resulting object is then passed to each benchmarking function.

**Individual Test Cases**

Each test case has a unique Benchmark Definition that uses one of the three approaches to check if the `window.obj` object is empty. The `Test Name` field provides a human-readable name for each approach, making it easier to identify and compare their performance results.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser/OS: Chrome 85 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
_.isEmpty	292699.7 Ops/sec
Object.keys().length	308259.2 Ops/sec
Object.values().length pour Laurent	74795.9 Ops/sec

Related benchmarks:

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

Comparing performance of: _.isEmpty vs Object.keys().length vs Object.values().length pour Laurent

Created: 4 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

Object.values().length pour Laurent

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):