Benchmark: Lodash Ben - MeasureThat.net

HTML Preparation code:

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

Script Preparation code:

var obj = {
  a: 1,
  b: 2,
  c: 3,
  d: {
    a: 1
  },
  g: {
    a: {
      c: 1
    }
  }
}

Tests:

test 1
if (obj == null) { return true } const Ctor = obj && obj.constructor const proto = (typeof Ctor === 'function' && Ctor.prototype) || objectProto if (obj === proto) { return !Object.keys(obj).length } for (const key in obj) { if (hasOwnProperty.call(obj, key)) { return false } }
test 2
_.isEmpty(obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test 1
test 2

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 llama3.2:3b, generated one year 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 Overview**

The benchmark measures the performance of JavaScript functions related to object comparison, specifically checks if an object is empty or not. The tests are designed to simulate real-world scenarios where objects are compared for emptiness in various situations.

**Script Preparation Code**

The script preparation code provides an example object `obj` with nested properties:
```javascript
var obj = {
  a: 1,
  b: 2,
  c: 3,
  d: {
    a: 1
  },
  g: {
    a: {
      c: 1
    }
  }
};
```
This object has multiple levels of nesting, which is relevant to the benchmark tests.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads Lodash.js version 4.17.5:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
```
Lodash is a popular JavaScript library that provides utility functions, including ones for working with objects.

**Individual Test Cases**

There are two test cases:

1. **test 1**: This test case checks if the object `obj` is empty or not. The benchmark definition code uses several steps to determine this:
	* Checks if `obj` is null or undefined.
	* If it's an object, checks its prototype chain using `typeof Ctor === 'function' && Ctor.prototype`.
	* Then, it iterates over the object's properties using a `for...in` loop and checks if any of them are own properties using `hasOwnProperty.call(obj, key)`. If no own properties are found, the test returns true.
2. **test 2**: This test case uses Lodash's `_.isEmpty()` function to check if an object is empty.

**Library and Special JavaScript Features**

In the benchmark definition, Lodash is used as a library for its utility functions. Specifically, the `_` symbol is used as a namespace, which allows access to various functions within the library.

There are no special JavaScript features or syntax mentioned in this benchmark definition. However, it does rely on standard JavaScript concepts such as objects, prototypes, and loop constructs (e.g., `for...in`, `hasOwnProperty.call()`).

**Alternatives**

Other alternatives for checking if an object is empty could include:

* Using the `Object.keys()` method to count the number of own properties.
* Implementing a custom function using recursion or iteration.

However, Lodash's `_.isEmpty()` function provides a convenient and efficient way to check if an object is empty, which makes it a suitable choice for this benchmark.

Related benchmarks:

Lodash Ben (version: 0)

Comparing performance of: test 1 vs test 2

Created: 3 years ago by: Guest

Jump to the latest result

test 1

test 2

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):