Benchmark: arr.find vs arr.some

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

array find
var a = ['hello', 'a', 'bc', 1, 'ferr', 'dfaskn', null, 'bc', 10, 45, NaN]; var b = a.find(item => item === 'bc');
array some
var a = ['hello', 'a', 'bc', 1, 'ferr', 'dfaskn', null, 'bc', 10, 45, NaN]; var b = a.some(item => item === 'bc');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array find
array some

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array find	15353452.0 Ops/sec
array some	15278510.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The benchmark compares two ways to check if an item exists in an array: `arr.find()` and `arr.some()`. The test case uses the Lodash library, which is a popular utility library for functional programming tasks.

**Options Compared**

The benchmark tests two options:

1. **Lodash's `find()` method**: This method returns the first element that satisfies the provided callback function.
2. **Traditional `concat()` method with array iteration**: This approach involves creating a new array by concatenating the original array with an empty array, and then iterating over the resulting array to check if the desired item exists.

**Pros and Cons**

1. **Lodash's `find()` method**:
	* Pros:
		+ More concise and expressive code.
		+ Less error-prone, as it automatically handles null or undefined values.
	* Cons:
		+ May have higher overhead due to the use of a library function.
2. **Traditional `concat()` method with array iteration**:
	* Pros:
		+ No external library dependencies.
		+ Can be faster for small arrays or when strict control over iteration is required.
	* Cons:
		+ More verbose and error-prone code.
		+ May not handle null or undefined values correctly.

**Lodash Library**

The Lodash library provides a set of functional programming utilities, including `find()`. The `find()` method takes two arguments: the array to search and a callback function that returns the desired item. In this benchmark, the `find()` method is used with a callback function that checks if the item is equal to `'bc'`.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition.

**Benchmark Preparation Code**

The script preparation code includes a single line of JavaScript code:
```javascript
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>
```
This code includes the Lodash library, which is required for the `find()` method.

**Test Preparation Code**

The test preparation code includes two lines of JavaScript code:
```javascript
var a = ['hello', 'a', 'bc', 1, 'ferr', 'dfaskn', null, 'bc', 10, 45, NaN];
var b = a.find(item => item === 'bc');
```
These lines create an array `a` with the desired items and use Lodash's `find()` method to find the first occurrence of `'bc'`.

**Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

1. **Manual iteration**: You can use traditional JavaScript loop constructs (e.g., `for`, `while`) to iterate over the array and check for the desired item.
2. **ES6 `some()` method**: While not used in this benchmark, you could also test the `some()` method, which returns `true` if at least one element satisfies the provided callback function.
3. **Other libraries**: Depending on your specific use case, you might consider using other libraries or frameworks that provide similar functionality to Lodash.

I hope this explanation helps! Let me know if you have any further questions.

Related benchmarks:

arr.find vs arr.some (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: array find vs array some

Created: 2 years ago by: Guest

Jump to the latest result

array find

array some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):