Benchmark: Compare performance indexOf, includes, some

Script Preparation code:

var array = ['banana', 'apple', 'orange', 'pineapple', 'cherry', 'tomato', 'raspberry']

Tests:

indexOf
array.indexOf('tomato') !== 1
includes
array.includes('tomato')
some
array.some(v => v === 'tomato')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
includes
some

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is tested, compared options, pros and cons of each approach, library usage, special JS features or syntax, and other considerations.

**Benchmark Definition**

The benchmark defines three test cases:

1. `array.indexOf('tomato') !== 1`
2. `array.includes('tomato')`
3. `array.some(v => v === 'tomato')`

These tests aim to compare the performance of three different methods in JavaScript: `indexOf`, `includes`, and `some`.

**Options Compared**

The options being compared are:

* `indexOf`: a method that returns the index of the first occurrence of a specified value in an array. If the value is not found, it returns -1.
* `includes`: a method that checks if an element with the specified value exists in an array.
* `some`: a method that returns true if at least one element in an array satisfies the provided condition.

**Pros and Cons of Each Approach**

Here's a brief overview of each approach:

* `indexOf`:
	+ Pros: generally faster than `includes` for searching in arrays. However, it can be slow for large arrays because it iterates through the entire array to find the index.
	+ Cons: returns -1 if the value is not found, which may be undesirable in some cases.
* `includes`:
	+ Pros: more concise and readable than `indexOf`, as it eliminates the need to handle the case where the value is not found. It also returns false immediately when the value is not found.
	+ Cons: generally slower than `indexOf` for searching in arrays, especially for large arrays.
* `some`:
	+ Pros: more concise and readable than using a loop or conditional statement to check if at least one element satisfies the condition.
	+ Cons: can be slower than `includes` because it iterates through the array until it finds an element that matches the condition.

**Library Usage**

There is no explicit library usage in this benchmark. However, some JavaScript engines may include internal libraries or optimizations that could affect the results.

**Special JS Features or Syntax**

None are mentioned in this specific benchmark. However, it's worth noting that `some` uses a syntax similar to a callback function (`v => v === 'tomato'`) which is a common feature in modern JavaScript.

**Other Considerations**

* The use of an array with a large number of elements (7) may skew the results for small arrays. For smaller arrays, other approaches might be more suitable.
* The benchmark does not account for edge cases like empty arrays or null/undefined values.
* The execution counts per second are measured in the latest benchmark result, which provides insight into the performance characteristics of each approach.

**Alternatives**

Other alternatives to these methods could include:

* Using a library like Lodash or Ramda for array operations
* Implementing custom array search algorithms using techniques like binary searching
* Using other JavaScript features like `findIndex` or `forEach` instead of `some`

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

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 12; M2101K6P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 106 on Android

View result in a separate tab

Test name	Executions per second
indexOf	4346482.5 Ops/sec
includes	5032378.5 Ops/sec
some	4549931.0 Ops/sec

Related benchmarks:

Compare performance indexOf, includes, some (version: 0)

Compare performance indexOf, includes, some in javascript

Comparing performance of: indexOf vs includes vs some

Created: 2 years ago by: Guest

Jump to the latest result

indexOf

includes

some

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):