Benchmark: lodash isEmpty vs isEqual

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 = {};

Tests:

isEmpty
_.isEmpty(obj)
isEqual
_.isEqual(obj, {})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isEmpty
isEqual

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36

Browser/OS: Chrome 90 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
isEmpty	4692103.5 Ops/sec
isEqual	1574402.9 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 and its test cases.

**What is tested?**

The website MeasureThat.net tests two specific functions from the Lodash library: `_.isEmpty` and `_.isEqual`. These functions are used to check if an object is empty or if two objects are equal, respectively.

**Options compared**

Two options are being compared:

1. **_.isEmpty(obj)**: This function checks if an object has any properties.
2. **_.isEqual(obj, {})**: This function checks if two objects have the same properties and values.

**Pros and Cons of different approaches**

**_.isEmpty(obj)**

* Pros:
	+ Fast and efficient, as it only needs to check for the existence of any properties.
	+ Can be useful in situations where you want to know if an object is empty or not.
* Cons:
	+ May return false positives if the object has a very large number of properties (due to JavaScript's property lookup mechanism).
	+ Does not account for objects that have properties with default values.

**_.isEqual(obj, {})**

* Pros:
	+ More accurate than _.isEmpty, as it checks both the existence and value of properties.
	+ Can be useful in situations where you want to know if two objects are identical.
* Cons:
	+ Slower and more memory-intensive than _.isEmpty, as it needs to compare each property.

**Other considerations**

Both functions assume that the object being passed to them is a plain JavaScript object (i.e., not an array or other data structure). If you need to use these functions with other data structures, you may need to modify them accordingly.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a collection of functional programming helpers. The `_.isEmpty` and `_.isEqual` functions are part of the Lodash library's array and object manipulation modules.

**Special JS feature/Syntax**

There is no special JavaScript feature or syntax being used in this benchmark. However, it's worth noting that MeasureThat.net uses a custom benchmarking framework that allows for easy comparison of different benchmarks across various platforms and browsers.

**Other alternatives**

If you don't want to use Lodash or if you prefer not to rely on third-party libraries, you can implement these functions yourself using JavaScript:

* `_.isEmpty(obj)`:
```javascript
function isEmpty(obj) {
  return Object.keys(obj).length === 0;
}
```
* `_.isEqual(obj, {})`:
```javascript
function isEqual(obj, other) {
  if (typeof obj !== 'object' || typeof other !== 'object') return false;
  const keys = Object.keys(obj);
  for (const key of keys) {
    if (!Object.prototype.hasOwnProperty.call(other, key) || obj[key] !== other[key]) return false;
  }
  return true;
}
```
Keep in mind that these implementations may not be as efficient or robust as the Lodash versions.

Related benchmarks:

lodash isEmpty vs isEqual (version: 0)

Comparing performance of: isEmpty vs isEqual

Created: 4 years ago by: Registered User

Jump to the latest result

isEmpty

isEqual

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):