Benchmark: array find vs some vs for of

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

array find
var a = ['hello', 'a', 'bc']; var b = a.find(item => item === 'bc');
array some
var a = ['hello', 'a', 'bc']; var b = a.some(item => item === 'bc');
for of
const a = ['hello', 'a', 'bc']; for (const k of a) { if (k === "bc") { return k; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array find
array some
for of

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is tested in each benchmark.

**Benchmark Definition**
The `array find vs some vs for of` benchmark compares three different approaches to check if an element exists in an array:

1. `find()`: Returns the first element that satisfies the provided condition.
2. `some()`: Returns a boolean value indicating whether at least one element satisfies the provided condition.
3. `for...of`: Uses a loop to iterate over the array and returns the first matching element.

**Options Compared**
The benchmark compares the performance of these three approaches on an array with 100 elements, where the target element is 'bc'.

**Pros and Cons**

* `find()`:
	+ Pros: Efficient for finding a single specific element.
	+ Cons: Returns `undefined` if no element matches, which can lead to errors in some cases.
* `some()`: 
	+ Pros: More efficient than `for...of`, as it stops iterating as soon as it finds the first match.
	+ Cons: Returns a boolean value, making it less useful for finding the actual element.
* `for...of`:
	+ Pros: Allows you to inspect all elements that match the condition, which can be useful in some cases.
	+ Cons: Less efficient than `find()` and `some()`, as it iterates over all elements.

**Library Used**
The benchmark uses Lodash, a popular utility library for JavaScript. Specifically, it uses the `lodash.core` module, which provides the `find()` and `some()` functions.

**Special JS Feature or Syntax**
None mentioned in this specific benchmark, but note that some newer versions of JavaScript (e.g., ECMAScript 2022) introduced new syntax and features like const arrays, optional chaining (`?.`), and async/await. These are not relevant to this specific benchmark.

**Other Alternatives**

If you're looking for alternative implementations or approaches to these array methods:

* `indexOf()`: Returns the index of the first occurrence of a value in an array (not as efficient as `find()`).
* `includes()`: Similar to `indexOf()`, but returns a boolean value.
* Manual iteration using `forEach()`, `reduce()`, or other iteration methods.

For more information on JavaScript array methods and their performance, you can consult the benchmark results provided by MeasureThat.net.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Browser/OS: Chrome 98 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array find	155351296.0 Ops/sec
array some	153206736.0 Ops/sec
for of	112049688.0 Ops/sec

Related benchmarks:

array find vs some vs for of (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: array find vs array some vs for of

Created: 2 years ago by: Guest

Jump to the latest result

array find

array some

for of

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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