Benchmark: array some versus for loop early break

Script Preparation code:

var array = [];
for(i=0; i<10000; i++){
	array.push(i);
}

Tests:

early break
function find7() { for (const value of array) { if (value === 85) { return true; } } return false; } find7(array);
some
function find7() { return array.some((value) => { return value === 85; }); } find7(array);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
early break
some

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
early break	15740733.0 Ops/sec
some	22886062.0 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 benchmark and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Overview**

The provided benchmark measures the performance difference between using a traditional `for` loop with early break (in this case, when a specific value is found) versus using the `Array.prototype.some()` method. The goal is to determine which approach is faster.

**Options Compared**

1. **Traditional For Loop with Early Break**: This approach uses a `for` loop to iterate over the array and checks for the target value (`value === 85`) inside the loop. If the value is found, the loop breaks early.
2. **Array.prototype.some() Method**: This approach uses the `some()` method on an array to check if any element satisfies the provided condition (in this case, `value => value === 85`). The `some()` method returns a boolean value indicating whether at least one element meets the condition.

**Pros and Cons of Each Approach**

1. **Traditional For Loop with Early Break**
	* Pros:
		+ Direct access to individual elements in the array.
		+ Can be optimized for specific use cases (e.g., when the target value is known beforehand).
	* Cons:
		+ More verbose and harder to read than using `some()`.
		+ Requires manual loop termination, which can lead to unnecessary iterations.
2. **Array.prototype.some() Method**
	* Pros:
		+ Concise and readable syntax.
		+ Eliminates the need for explicit loop termination.
		+ Built-in support in modern browsers.
	* Cons:
		+ Can be slower than traditional loops for large arrays due to overhead from the `some()` method implementation.

**Library Used**

In this benchmark, the `Array.prototype.some()` method is used. This method is a part of the ECMAScript standard and is supported by most modern browsers. It's designed to iterate over an array and return `true` as soon as any element meets the condition.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. However, it's worth noting that the use of `const` (in the `for...of` loop) is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). The use of `=>` for function arrow functions is also a part of ES6.

**Other Alternatives**

For this specific problem, you could also consider using:

* **Array.prototype.find() Method**: Similar to `some()` but returns the first element that meets the condition instead of just returning `true`.
* **Traditional For Loop with Indexing**: Instead of using an early break, you could use indexing to directly access elements in the array. This approach can be faster for large arrays but is less readable and verbose.

Keep in mind that the choice of implementation depends on the specific requirements and constraints of your project.

Related benchmarks:

array some versus for loop early break (version: 0)

Comparing performance of: early break vs some

Created: 7 years ago by: Guest

Jump to the latest result

early break

some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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