Benchmark: find() vs for...of vs for-loop multi variable

HTML Preparation code:

<div id='test'></div>

Tests:

for-loop
var arr = ['hello', 'a', 'b', 'c', 'f', 123]; let val, a, b, c; for(i=0; i<arr.length; i++){ var value = arr[i]; if (value === 'f') { val = value; break; } if (value === 'a') { a = value } if (value === 'b') { b = value } if (value === 'c') { c = value } }
for..of
var arr = ['hello', 'a', 'b', 'c', 'f', 123]; let val, a, b, c; for (var value of arr) { if (value === 'f') { val = value; break; } if (value === 'a') { a = value } if (value === 'b') { b = value } if (value === 'c') { c = value } }
Array.find()
var arr = ['hello', 'a', 'b', 'c', 'f', 123]; let val = arr.find(node => node.id === 'f'); let a = arr.find(node => node.id === 'a'); let b = arr.find(node => node.id === 'b'); let c = arr.find(node => node.id === 'c');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for-loop
for..of
Array.find()

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The benchmark is designed to compare the performance of three different approaches:

1. `for` loop
2. `for...of` loop (introduced in ECMAScript 2015)
3. `Array.find()` method

These approaches are used to find specific elements within an array that matches a certain condition.

**Options Being Compared**

The options being compared are the performance of each approach when searching for multiple variables in an array:

* **For Loop**: A traditional `for` loop using a counter variable (`i`) to iterate over the array.
* **For...of Loop**: An enhanced `for` loop that uses the iterator protocol to iterate over the array.
* **Array.find() Method**: A method introduced in ECMAScript 2015 for finding the first element in an array that satisfies a given condition.

**Pros and Cons of Each Approach**

Here's a brief summary of the pros and cons of each approach:

1. **For Loop**:
	* Pros: Easy to implement, familiar syntax.
	* Cons: Can be slow due to the overhead of incrementing a counter variable, prone to off-by-one errors.
2. **For...of Loop**:
	* Pros: More concise syntax, eliminates the need for explicit indexing or counters.
	* Cons: May incur performance overhead due to the iterator protocol, and its behavior can be different from traditional `for` loops.
3. **Array.find() Method**:
	* Pros: Concise syntax, efficient algorithm (stops searching as soon as it finds a match).
	* Cons: Introduced in ECMAScript 2015, may not be supported by older browsers or versions.

**Library Used**

There is no explicit library mentioned in the benchmark. However, the `Array.find()` method relies on the built-in array prototype methods.

**Special JS Feature/Syntax**

The use of arrow functions (`=>`) and template literals (`\r\nlet val, a, b, c;`) is an example of modern JavaScript syntax. The arrow function is used to define the callback function for `Array.find()`, while the template literal is used to declare variables.

**Other Alternatives**

If you're interested in exploring alternative approaches, consider:

* Using a library like Lodash or Ramda, which provide optimized array methods and functional programming utilities.
* Implementing custom array search algorithms using data structures like binary search trees (BSTs) or hash tables.
* Utilizing modern JavaScript features like `for await` loops or `Promise.all()` for parallel processing.

Keep in mind that each approach has its trade-offs, and the choice of implementation depends on the specific requirements and constraints of your project.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:95.0) Gecko/20100101 Firefox/95.0

Browser/OS: Firefox 95 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
for-loop	4736285.0 Ops/sec
for..of	5667775.0 Ops/sec
Array.find()	2445225.0 Ops/sec

Related benchmarks:

find() vs for...of vs for-loop multi variable (version: 0)

Testing the difference between native loops and find() with setting multiple variables

Comparing performance of: for-loop vs for..of vs Array.find()

Created: 2 years ago by: Guest

Jump to the latest result

for-loop

for..of

Array.find()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):