Benchmark: JS: find need element in array v.2

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var items = [{id: "1", name: "1"},{id: "2", name: "2"},{id: "3", name: "3"},{id: "4", name: "4"},{id: "5", name: "5"},{id: "6", name: "6"}];

Tests:

using Array.find
let needItem = items.find(function (item) { return item.id === "3"; });
using JQuery.each cycle
let needItem; $.each(items, function (i, item) { if (item.id === "3") { needItem = item; return false; } });
usign for...of cycle
let needItem; for (item of items) { if (item.id === "3") { needItem = item; break; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
using Array.find
using JQuery.each cycle
usign for...of cycle

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down what is tested in the provided benchmark.

The benchmark compares three approaches to find an element in an array:

1. **Array.prototype.find()**: This method returns the first element in the array that satisfies the provided condition. In this case, it searches for an item with an `id` property equal to `"3"`.
2. **jQuery's $.each()** (specifically, the "cycle" behavior): jQuery's `.each()` method executes a function for each element in the array. The "cycle" behavior means that once the condition is met, the loop continues to execute until the end of the iteration, even if the condition is false again.
3. **For-of cycle**: This approach uses a traditional `for` loop with the `of` keyword to iterate over the array elements.

**Pros and Cons:**

* **Array.prototype.find()**:
	+ Pros: concise, efficient, and suitable for most cases where only one element needs to be found.
	+ Cons: might throw an error if the array is empty or if no element satisfies the condition.
* **jQuery's $.each()` (cycle behavior)**:
	+ Pros: can handle edge cases like iterating over an empty array or stopping early when a match is found.
	+ Cons: introduces additional overhead due to the loop and may not be suitable for all use cases where only one result is expected.
* **For-of cycle**:
	+ Pros: simple, efficient, and doesn't introduce extra function calls or overhead like jQuery's `.each()`.
	+ Cons: might be less readable than other approaches, especially for those unfamiliar with the `for...of` syntax.

The benchmark results show the number of executions per second (ExecutionsPerSecond) for each approach on Firefox 112. This suggests that Array.prototype.find() is likely the fastest option in this specific case.

As for the libraries and special JavaScript features:

* **jQuery**: A popular JavaScript library for DOM manipulation and event handling. In this benchmark, it's used to provide a cycle behavior for $.each().
* **For-of cycle**: Introduced in ECMAScript 2015 (ES6), this syntax allows iterating over arrays using a `for` loop with the `of` keyword.

Other alternatives for finding an element in an array include:

* **Looping manually** (e.g., using a traditional `for` loop): This approach is straightforward but may be less efficient than using built-in methods like Array.prototype.find().
* **Using other iteration methods**, such as Array.prototype.forEach() or Array.prototype.some(): These methods can provide similar functionality to Array.prototype.find(), but might not be as concise.

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

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Linux

View result in a separate tab

Test name	Executions per second
using Array.find	132973056.0 Ops/sec
using JQuery.each cycle	14678773.0 Ops/sec
usign for...of cycle	10675650.0 Ops/sec

Related benchmarks:

JS: find need element in array v.2 (version: 1)

compare approaches for find need element in array

Comparing performance of: using Array.find vs using JQuery.each cycle vs usign for...of cycle

Created: 4 years ago by: Registered User

Jump to the latest result

using Array.find

using JQuery.each cycle

usign for...of cycle

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):