Benchmark: array indexOf vs includes vs some 2

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var array = ['bananasausasesus', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage', 'sausageesusagsagausagejeusausagsusage', 'findMe', 'sausageesusagsagausagejeusausagsusage', 'jesusjesusausage']

Tests:

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

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

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 Purpose**

The benchmark measures the performance of three different ways to check if an array contains a specific value:

1. `array.indexOf()` (IndexOf Method)
2. `array.includes()` (Includes Method)
3. `array.some()` (Some Method)

Each method is used to search for the presence of the string "findMe" in the pre-defined array.

**Options Compared**

The benchmark compares the performance of these three methods:

* **IndexOf Method**: This method returns the index of the first occurrence of the specified value, or -1 if it's not found.
* **Includes Method**: This method returns a boolean indicating whether the specified value is present in the array.
* **Some Method**: This method returns a boolean indicating whether at least one element in the array satisfies the provided condition (in this case, `v === 'findMe'`).

**Pros and Cons of Each Approach**

1. **IndexOf Method**
	* Pros: Returns an index if found, which can be useful for further processing.
	* Cons: May be slower than other methods since it has to search the entire array from the start.
2. **Includes Method**
	* Pros: Simple, efficient, and returns a boolean value.
	* Cons: May return false positives (e.g., if the array contains other values with the same string) or false negatives (if "findMe" is not present).
3. **Some Method**
	* Pros: Can stop searching as soon as it finds a match, making it suitable for large arrays.
	* Cons: Requires an additional function to be provided, which may add overhead.

**Library and Special JS Features**

The benchmark uses the Lodash library (`lodash.js`) in its HTML preparation code. However, no special JavaScript features or syntax are used in this benchmark.

**Other Alternatives**

If you need a faster alternative to `array.includes()`, you can use `String.prototype.indexOf()` instead, but keep in mind that it's also an array method and might not be as efficient for large arrays. Another option is using the `Set` data structure to store the array values and check for presence, which could potentially provide better performance.

Here's a simple example of how you can use `Set`:
```javascript
const set = new Set(array);
set.has('findMe');
```
However, this approach requires an additional data structure creation step, which might not be ideal for large arrays.

Related benchmarks:

array indexOf vs includes vs some 2 (version: 2)

performance comparison of ways to find if an array contains a value

Comparing performance of: indexOf vs includes vs some

Created: 3 years ago by: Registered User

Jump to the latest result

indexOf

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):