Benchmark: Test Includes vs some

Script Preparation code:

var testArray = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"];
var testValue = "seven";

Tests:

Includes
var result = testArray.includes(testValue);
some
var result = testArray.some((v) => v === testValue)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Includes
some

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare the performance of two JavaScript methods: `includes` and `some`. The script preparation code creates an array called `testArray` with 10 string elements, including the target value `"seven"`. The HTML preparation code is empty.

**Test Cases**

There are two test cases:

1. **Includes**: This test case uses the `includes` method to check if a specific element exists in the `testArray`.
2. **some**: This test case uses the `some` method with an arrow function to iterate over the elements of `testArray` and check if any of them match the target value.

**Library and Purpose**

The only library used in this benchmark is not explicitly mentioned, but based on the code, it appears to be a standard JavaScript library. The `includes` and `some` methods are built-in methods in JavaScript's Array prototype, so no external library is required.

**Special JS Features or Syntax**

There is one special feature being tested: arrow functions (introduced in ECMAScript 2015). Arrow functions are a concise way to define small functions. In this case, the `some` method uses an arrow function to iterate over the elements of the array.

**Options Compared**

The benchmark compares two options:

1. **Includes**: This method iterates over the array until it finds the target value or reaches the end. If the value is found, it returns a boolean indicating whether the value was found.
2. **some**: This method short-circuits as soon as it finds the first matching element. It does not iterate over the entire array.

**Pros and Cons of Each Approach**

1. **Includes**:
	* Pros: Can be faster for smaller arrays or when the target value is known to exist in the array.
	* Cons: May be slower for larger arrays, as it needs to iterate over all elements.
2. **some**:
	* Pros: Faster for large arrays, as it can short-circuit and stop iterating as soon as a match is found.
	* Cons: Can be slower if the target value does not exist in the array, as it still needs to iterate over all elements.

**Other Alternatives**

If you needed to check if an element exists in an array but didn't want to use the `includes` method or `some` method with a callback function, you could consider using other approaches:

* Using `indexOf()` and checking if the result is -1.
* Creating a custom loop that iterates over the array and checks each element.
* Using a library like Lodash's `some()` function (although this would introduce additional dependencies).

Keep in mind that these alternatives might have different performance characteristics depending on the specific use case.

Related benchmarks:

Test Includes vs some (version: 0)

Comparing performance of: Includes vs some

Created: 3 years ago by: Guest

Jump to the latest result

Includes

some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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