Benchmark: IndexOf boolean vs Includes vs Set

Script Preparation code:

var array = ["mat", "then", "social", "service", "forest", "demand", "limb", "chief", "pan", "over", "resign", "help", "wise", "ride", "sun", "further", "woman", "quantity", "widow", "stuff", "check", "limb", "become", "often", "animal", "control", "spend", "new", "wheat", "bare", "perform", "thread", "world", "inward", "handle", "creep", "student", "chair", "during", "visit", "measure", "wrap", "anyone", "confess", "somebody", "faith", "show", "somebody", "universe", "aim"]

Tests:

IndexOf
array.indexOf('aim') > -1
Includes
array.includes('aim')
Set!?
new Set(array).has('aim')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IndexOf
Includes
Set!?

Fastest: N/A

Slowest: N/A

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

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Let's dive into explaining the provided benchmark.

**Benchmark Definition JSON**

The provided JSON represents a JavaScript microbenchmark, which is a small piece of code designed to measure the performance of specific parts of a program. The benchmark consists of three test cases:

1. "IndexOf boolean vs Includes vs Set": This test case measures the performance of different methods for searching an element in an array.
2. Individual test cases:
	* "IndexOf"
	* "Includes"
	* "Set!?"

**Tested Options**

The options being compared are:

* `array.indexOf('aim') > -1`: Using the `indexOf` method to search for the presence of a specific element in an array.
* `array.includes('aim')`: Using the `includes` method to check if an element is present in an array.
* `new Set(array).has('aim')`: Creating a new set from the array and using the `has` method to search for the presence of an element.

**Pros and Cons**

Here's a brief overview of each option:

* **indexOf**: This method returns the index of the first occurrence of the specified value. If the value is not found, it returns -1.
	+ Pros: Fast and efficient, especially for large arrays.
	+ Cons: May not be suitable for cases where you need to find all occurrences of a value.
* **includes**: This method returns `true` if the array includes the element, and `false` otherwise.
	+ Pros: Simple and easy to use, with better support for modern browsers.
	+ Cons: May be slower than `indexOf` for large arrays, as it needs to scan the entire array.
* **Set!**: Creating a new set from an array using the `Set` constructor and then using the `has` method.
	+ Pros: Can be faster than `includes`, especially for very large arrays, as it uses a hash table under the hood.
	+ Cons: Requires creating an extra object (the set), which can be slower than just using one of the other methods.

**Library Usage**

The `includes` method and the `Set` constructor are built-in JavaScript methods, so no libraries are required. However, if you're using a specific implementation of these methods, you might need to consider that as well.

**Special JS Features or Syntax**

There are no special JS features or syntax mentioned in the provided benchmark definition.

**Alternative Approaches**

If you need to optimize search performance for your code, here are some alternative approaches:

* Use `Array.prototype.findIndex` instead of `indexOf`. This method returns the index of the first occurrence of the specified value, and it's more modern and efficient than `indexOf`.
* Consider using a data structure like a trie or a suffix tree, which can be optimized for fast searching.
* If you're dealing with very large arrays, consider using parallel processing techniques to speed up search operations.

Keep in mind that optimizing performance usually requires understanding the specific requirements of your use case and experimenting with different approaches.

Related benchmarks:

IndexOf boolean vs Includes vs Set (version: 0)

if 50 elements array contains some word

Comparing performance of: IndexOf vs Includes vs Set!?

Created: 4 years ago by: Guest

Jump to the latest result

IndexOf

Includes

Set!?

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):