Benchmark: .find vs while loop javascript

Script Preparation code:

var data = [...Array(1000000).fill({
    filtering: false,
    mapping: 42
}), ...Array(1000000).fill({
    filtering: true,
    mapping: 42
})];

Tests:

.find
let next = data.find((e, index) => e.filtering === true); let next_index = data.indexOf(next); // console.log('next_login - ', next_login); // console.log('next_login_index - ', next_login_index); console.log('Index: ', next_index)
while loop
let loopStop = false; let i = 0; while (i < data.length && !loopStop) { i++; if (data[i] && data[i].filtering === true) { i--; loopStop = true; } } console.log('Index: ', i)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
.find
while loop

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser/OS: Firefox 139 on Linux

View result in a separate tab

Test name	Executions per second
.find	273.9 Ops/sec
while loop	651.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches: using the `Array.prototype.find()` method and a traditional `while` loop.

**Script Preparation Code**

The script generates an array of 2 million objects, half of which have a `filtering` property set to `true`. This setup is used for both test cases.

**Html Preparation Code**

Since this is a JavaScript microbenchmark, there is no HTML code involved.

**Individual Test Cases**

There are two test cases:

1. **`.find`**: This test case uses the `Array.prototype.find()` method to find an element in the array that meets a certain condition (`filtering === true`). It also uses the `indexOf()` method to retrieve the index of the found element.
2. **`while loop`**: This test case uses a traditional `while` loop to iterate over the array and find an element with `filtering === true`. The loop is stopped when it finds the first matching element.

**Libraries**

There are no libraries explicitly mentioned in the benchmark definition. However, it's worth noting that `Array.prototype.find()` is a part of the ECMAScript standard, so it doesn't rely on any external library.

**Special JS Features or Syntax**

The test cases use two special features:

1. **Arrow functions**: The `find` method uses an arrow function as its callback parameter.
2. **Spread operator**: The script uses the spread operator (`...`) to create a new array and fill it with objects.

**Pros and Cons of Different Approaches**

Here are some pros and cons of each approach:

1. **`.find()`**:
	* Pros:
		+ More concise and expressive code
		+ Easier to read and maintain
		+ Often faster due to optimized implementation
	* Cons:
		+ May not work as expected if the array is very large or has many null/undefined elements
2. **`while loop`**:
	* Pros:
		+ Can be more efficient for large arrays due to caching and fewer method calls
		+ More control over iteration and termination conditions
	* Cons:
		+ Code can become complex and hard to read if not implemented carefully
		+ May require more manual memory management

**Other Considerations**

When choosing between these approaches, consider the following:

1. **Code readability**: If you prioritize code clarity and maintainability, `.find()` might be a better choice.
2. **Performance**: For large arrays or performance-critical applications, `while loop` might provide better results.
3. **Array size and complexity**: If your array is very large or has many null/undefined elements, consider the potential drawbacks of `.find()`.

**Alternatives**

If you're looking for alternative approaches to find an element in an array, consider:

1. **`.some()` method**: Similar to `.find()`, but returns `true` if at least one element meets the condition.
2. **Manual iteration**: Use a traditional `for` loop or `forEach()` method to iterate over the array and check each element individually.

In summary, this benchmark compares two approaches for finding an element in an array: using the `.find()` method versus a traditional `while` loop. The choice between these approaches depends on factors like code readability, performance requirements, and array size and complexity.

Related benchmarks:

.find vs while loop javascript (version: 0)

.find vs while loop javascript

Comparing performance of: .find vs while loop

Created: 3 years ago by: Guest

Jump to the latest result

.find

while loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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