Benchmark: Lodash isEmpty vs Object.keys().length not empty 123

HTML Preparation code:

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

Tests:

Lodash isEmpty
console.log(!_.isEmpty(undefined))
Object.keys().length
console.log(!!Object.values(Object(undefined)).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: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash isEmpty	522535.6 Ops/sec
Object.keys().length	501699.6 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):

LLMs can make mistakes. Check important info.

The benchmark provided assesses the performance of two different methods for determining if an object is empty in JavaScript. The two approaches being compared are:

1. **Using Lodash's `isEmpty` function**: `_.isEmpty()`
2. **Using native JavaScript's `Object.keys().length` method**: `Object.values(Object(undefined)).length`

### Libraries and Their Purpose

**Lodash**: 
Lodash is a popular JavaScript utility library that provides helpful functions for common programming tasks, including manipulation of arrays, objects, and other data types. The `isEmpty` function is specifically used to determine if a value is an empty object, collection, map, or set.

### Test Description and Comparison

1. **Lodash `isEmpty` Test**
   - **Test Name**: Lodash isEmpty
   - **Benchmark Definition**: `console.log(!_.isEmpty(undefined))`
   - **Execution Result**: Executions per second: 522,535.59

This test checks whether `undefined` is treated as "empty" by Lodash's `isEmpty` function. The Lodash library provides a streamlined and more consistent way of checking for emptiness across various types of data structures (arrays, objects, etc.).

**Pros**:
   - Simple and readable syntax.
   - Handles various data types, returning a consistent result for emptiness.
   - Built-in handling of edge cases.

**Cons**:
   - Additional library dependency.
   - Slight overhead due to function call and inclusion of the entire library.

2. **Object.keys().length Test**
   - **Test Name**: Object.keys().length
   - **Benchmark Definition**: `console.log(!!Object.values(Object(undefined)).length)`
   - **Execution Result**: Executions per second: 501,699.56

This test uses the native JavaScript method `Object.keys()` to determine if an object has any enumerable properties. The way it works here is less straightforward; it first converts `undefined` to an object (which does not return an object but the object representation of undefined) to check its properties.

**Pros**:
   - No additional library dependency.
   - Works similarly for basic object checks.

**Cons**:
   - Slightly less readable and intuitive than Lodash's approach.
   - Potentially less robust handling of different object types and edge cases.
   - Requires understanding of how JavaScript handles undefined values, which might not be immediately clear.

### Performance Results

From the benchmark results, it can be observed that both methods were relatively close in performance, with Lodash's `isEmpty` method performing slightly better than using `Object.keys().length`. This might be marginally impacted by various factors, including the JavaScript engine optimizations and the inherent overhead of including the Lodash library.

### Other Alternatives

- **Using `Object.keys(obj).length === 0`**: This is another common alternative to check if an object is empty. It checks the count of the object's own enumerable properties and compares it to 0.
  
- **Using `JSON.stringify(obj) === '{}'`**: This method serializes the object to a string and checks if it’s equivalent to an empty object. However, this approach is generally less performant and can lead to unexpected results for non-plain objects or those with non-enumerable properties.

### Conclusion

Both the Lodash `isEmpty` method and the native `Object.keys().length` approach have their merits. The choice between them might depend on the specific scenario, including considerations for code readability, consistency across different data types, performance demands, and whether adding a library dependency aligns with the project’s goals.

Related benchmarks:

Lodash isEmpty vs Object.keys().length not empty 123 (version: 1)

testtest

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

Created: one year ago by: Guest

Jump to the latest result

Lodash isEmpty

Object.keys().length

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):