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

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;
loop
function isEmpty(obj) { for(var prop in obj) { if(obj.hasOwnProperty(prop)) return false; } return true; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length
loop

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark is testing the performance of three different approaches to check if an object (`window.obj`) created with 100 key-value pairs is empty or not:

1. Using the `_.isEmpty` function from Lodash library
2. Using `Object.keys()` method and checking its length
3. Implementing a custom loop to check for own properties using `for...in` loop

**Test Cases**

Each test case has a Benchmark Definition, which is the code that will be executed multiple times to measure performance. The Test Name provides a brief description of what each test case represents.

1. **_.isEmpty**
	* Benchmark Definition: `_.isEmpty(window.obj);`
	* This test uses the `_.isEmpty` function from Lodash library (loaded via `<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>`) to check if the object is empty.
2. **Object.keys().length**
	* Benchmark Definition: `Object.keys(window.obj).length === 0;`
	* This test uses the `Object.keys()` method to get an array of keys from the object and then checks its length to determine if the object is empty.
3. **loop**
	* Benchmark Definition: A custom function `isEmpty(obj)` that iterates over the object's properties using a `for...in` loop to check for own properties.
	* This test implements a simple loop to check if the object is empty by iterating over its properties.

**Benchmark Results**

The latest benchmark results show the performance of each test case in terms of executions per second. The results indicate that:

1. **loop** approach: 859,404,864.0 executions/second (fastest)
2. **_.isEmpty**: 3,478,602.25 executions/second
3. **Object.keys().length**: 1,028,266.5 executions/second

The results suggest that the custom loop approach is significantly faster than using Lodash's `_.isEmpty` or the built-in `Object.keys()` method.

**Other Considerations**

* **Pros and Cons**:
	+ Custom loop: Pros (fastest), Cons (inefficient for large objects, potential issues with object mutation)
	+ _.isEmpty: Pros (efficient, widely used library), Cons (dependency on Lodash library)
	+ Object.keys().length: Pros (easy to use, built-in method), Cons (slower than custom loop or _.isEmpty)
* **Alternatives**:
	+ Instead of using a custom loop, consider using the `Object.getOwnPropertyNames()` method, which returns an array of own property names. This approach is more efficient than iterating over all properties using `for...in`.
	+ If you need to check for empty objects frequently, consider using a more optimized solution, such as caching the result or using a specialized library.

Please let me know if you'd like me to clarify any points!

Related benchmarks:

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

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

Created: 5 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):