Benchmark: array find vs some speed test

Script Preparation code:

var array = [];
for(let i = 0; i<100000; i++){
  array.push(`item-${i}`);
}

Tests:

array find
var b = array.find(item => item === 'item-58900');
array some
var b = array.some(item => item === 'item-58900');

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 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 121 on Android

View result in a separate tab

Test name	Executions per second
array find	356.3 Ops/sec
array some	345.6 Ops/sec

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 and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches to find an element in an array: `Array.prototype.find()` (ES6 spread operator) and `Array.prototype.some()`. The goal is to determine which method is faster for finding a specific element in a large array.

**Options Being Compared**

There are two options being compared:

1. **`Array.prototype.find()`**: This method returns the first element in the array that satisfies the provided condition. In this case, it's used to find an element with a specific string value (`'item-58900'`).
2. **`Array.prototype.some()`**: This method returns `true` if at least one element in the array satisfies the provided condition. It's used to check if any element matches the target string value.

**Pros and Cons of Each Approach**

1. **`Array.prototype.find()`**:
	* Pros: Returns the exact element you're looking for, which can be useful for finding a specific item. It's also generally considered more readable and efficient than `some()`.
	* Cons: Throws an error if no elements match the condition, which might not be desirable in all cases.
2. **`Array.prototype.some()`**:
	* Pros: Returns `true` as soon as it finds a matching element, making it potentially faster for large arrays with many matches.
	* Cons: Returns `false` when no elements match, which can lead to unnecessary iterations.

**Library and Special JS Features**

In this benchmark, the following library is used:

1. **None**: There are no external libraries required for these tests.

No special JavaScript features are being tested in this benchmark. The focus is solely on the comparison of `find()` and `some()` methods.

**Other Alternatives**

If you're interested in alternative approaches to find an element in an array, consider the following:

1. **`Array.prototype.indexOf()`**: This method returns the index of the first occurrence of the specified value. If no match is found, it returns `-1`.
2. **Using a `for...of` loop**: You can use a traditional loop to iterate over the array and check each element against the target value.

**Conclusion**

In summary, this benchmark compares two methods for finding an element in an array: `Array.prototype.find()` (ES6 spread operator) and `Array.prototype.some()`. The results will help determine which method is faster and more suitable for your specific use case.

Related benchmarks:

array find vs some speed test (version: 0)

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

Comparing performance of: array find vs array some

Created: 5 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):