Benchmark: array indexOf vs includes vs some aaa

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 = ['banana', 'sausage', 'jesus']

Tests:

IndexOf
array.indexOf('banana') !== 1
Includes
array.includes('banana')
some
array.some(v => v === 'banana')

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):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**What is being tested?**

The test case measures the performance of three different methods to check if an array contains a specific value:

1. `array.indexOf()`
2. `array.includes()`
3. `array.some()`

These methods are used to determine whether a particular element exists in the array.

**Comparison of options:**

Here's a brief overview of each method and their pros/cons:

* `indexOf()`: This method returns the index of the first occurrence of the specified value in the array, or -1 if it is not found. The pros are that it is simple and efficient for arrays with small numbers of elements. However, the cons are:
	+ Can be slow for large arrays (O(n) time complexity)
	+ Returns an index, which may be unnecessary
* `includes()`: This method returns a boolean value indicating whether the specified value is present in the array. The pros are that it is simple and efficient (O(n) time complexity), and it's a more concise way to check for presence. However, the cons are:
	+ May have slightly higher overhead than `indexOf()` due to the implicit loop
* `some()`: This method returns a boolean value indicating whether at least one element in the array satisfies the provided callback function. The pros are that it's flexible and can be used for more complex checks. However, the cons are:
	+ May have higher overhead due to the need to execute the callback function for each element
	+ Returns a boolean value, which may not be as immediately useful as an index or presence value

**Library usage:**

The benchmark uses the `lodash` library, specifically the `lodash.includes()` function. This is used in the `includes()` test case. The `lodash` library provides a more efficient and consistent implementation of the `includes()` method.

**Special JS features/syntax:**

None mentioned in this benchmark.

**Other considerations:**

* Performance: Measuring performance is crucial for benchmarks, as it helps identify which methods are fastest.
* Consistency: Using consistent naming conventions, syntax, and libraries can make comparisons easier to understand.
* Test setup: The test code is simple and focused on the specific use case, which makes it easy to reproduce.

**Alternatives:**

For measuring array performance, you could consider using other benchmarking tools or frameworks, such as:

* Benchmark.js
* jsperf
* microbenchmark

These tools offer different features, flexibility, and customization options. Some might be more suitable for specific use cases or performance characteristics.

In summary, the provided benchmark measures the performance of three methods to check if an array contains a value: `indexOf()`, `includes()`, and `some()`. Each method has its pros and cons, and the benchmark uses the `lodash` library for the `includes()` test case.

Related benchmarks:

array indexOf vs includes vs some aaa (version: 0)

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

Comparing performance of: IndexOf vs Includes vs some

Created: 4 years ago by: Guest

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):