Benchmark: array Boolean(find) vs some

Tests:

array find
var a = ['hello', 'a', 'bc']; var b = Boolean(a.find(item => item === 'bc'));
array some
var a = ['hello', 'a', 'bc']; 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
array find	15312779.0 Ops/sec
array some	247381632.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the JavaScript microbenchmark provided by MeasureThat.net.

**Benchmark Definition:**
The benchmark is designed to compare two approaches for checking if an array contains a specific value:

1. **`Boolean(a.find(item => item === 'bc'))`**: This approach uses the `find()` method, which returns an iterator object that yields the first element in the array that satisfies the provided condition (in this case, `item === 'bc'`). The `Boolean()` function then converts this result to a boolean value (`true` if found, `false` otherwise). Note that `find()` will only find the first match and returns early.
2. **`a.some(item => item === 'bc')`**: This approach uses the `some()` method, which returns a boolean value indicating whether at least one element in the array satisfies the provided condition (in this case, `item === 'bc'`). Unlike `find()`, `some()` will iterate through all elements and return `true` as soon as it finds a match.

**Options Compared:**
The two options being compared are:

* **`Boolean(a.find(item => item === 'bc'))`**: This approach uses the `find()` method, which is generally slower than `some()` because it returns an iterator object that needs to be consumed.
* **`a.some(item => item === 'bc')`**: This approach uses the `some()` method, which is typically faster than `find()` because it only iterates through the array until it finds a match.

**Pros and Cons:**

* **`Boolean(a.find(item => item === 'bc'))`**:
	+ Pros:
		- More intuitive for developers who are used to working with arrays.
		- Can be more expressive when using more complex conditions.
	+ Cons:
		- Typically slower due to the iterator object returned by `find()`.
* **`a.some(item => item === 'bc')`**:
	+ Pros:
		- Faster because it only iterates through the array until it finds a match.
	+ Cons:
		- Less intuitive for developers who are not familiar with `some()`.
		- May be less expressive when using more complex conditions.

**Library Used:**
None of the provided benchmark definitions rely on any external libraries. The code uses only built-in JavaScript methods (`find()` and `some()`).

**Special JS Features/Syntax:**
The benchmarks use:

* **Arrow functions**: Both benchmarks use arrow functions as the callback function for `find()` and `some()`. This is a modern syntax that was introduced in ECMAScript 2015.
* **Template literals**: The `var b = Boolean(a.find(item => item === 'bc'));` line uses template literals to create a string. While not necessary, it's a convenient feature when working with strings.

**Other Alternatives:**
If you want to explore alternative approaches for checking if an array contains a specific value, consider the following options:

* **Using `Array.prototype.includes()`**: This method is similar to `some()`, but returns a boolean value directly instead of returning an iterator object.
```javascript
a.includes('bc')
```
* **Using a custom loop**: You can write a simple loop using `for` or `while` statements to iterate through the array and check each element for the match. This approach is generally slower than using `find()` or `some()`.
```javascript
var result = false;
for (var i = 0; i < a.length; i++) {
    if (a[i] === 'bc') {
        result = true;
        break;
    }
}
```
Keep in mind that these alternatives may have performance implications compared to using `find()` or `some()`.

Related benchmarks:

array Boolean(find) vs some (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):