Benchmark: find vs findindex with condition test

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = i++;

Tests:

Array.prototype.find
const item = arr.find(item => item == 1E5);
Array.prototype.findIndex
const index = arr.findIndex(item => item == 1E5) > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.find
Array.prototype.findIndex

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 dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The benchmark is designed to measure the performance difference between two methods in the Array.prototype: `find` and `findIndex`. The script preparation code generates an array of 100,000 elements using a while loop, where each element is assigned a value equal to its index. This creates a dense array with evenly spaced values.

**Options Compared**

The benchmark compares the performance of two approaches:

1. **Array.prototype.find**: Returns the first element in the array that satisfies the provided condition (in this case, `item == 1E5`).
2. **Array.prototype.findIndex**: Returns the index of the first element in the array that satisfies the provided condition (in this case, `item == 1E5`) and returns -1 if no element matches.

**Pros and Cons**

**Array.prototype.find**:

Pros:

* More intuitive for finding a single value in an array.
* Can be more readable code.

Cons:

* Can return null or undefined if the condition is not met.
* May cause unnecessary iterations if the condition is not satisfied on the first iteration.

**Array.prototype.findIndex**:

Pros:

* Returns an index, which can be useful for further processing.
* Avoids returning null or undefined.

Cons:

* Requires checking the result to see if it's -1 (indicating no match).
* Can be less readable due to the need to check the return value.

**Library Usage**

There is no explicit library usage in this benchmark. However, JavaScript has a set of built-in methods and functions that make these operations efficient.

**Special JS Feature/Syntax**

None mentioned explicitly. Both `find` and `findIndex` are standard Array.prototype methods, and their syntax is well-documented.

**Other Alternatives**

If you were to implement this benchmark yourself or consider alternatives, here are a few options:

* Use `Array.prototype.some()` or `Array.prototype.every()` instead of `find` and `findIndex`. These methods return a boolean value indicating whether at least one element or all elements satisfy the condition.
* Implement custom loop-based solutions for finding and indexing elements in the array. This would eliminate the use of built-in Array.prototype methods.

When writing similar benchmarks, consider factors like:

* The size and complexity of the input data.
* The specific requirements of your application (e.g., performance-critical or readability-focused).
* Whether using built-in methods or custom implementations is more suitable for your needs.

I hope this explanation helps you understand what's being tested in MeasureThat.net!

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser/OS: Chrome 91 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.prototype.find	941.2 Ops/sec
Array.prototype.findIndex	938.2 Ops/sec

Related benchmarks:

find vs findindex with condition test (version: 0)

Measuring which is faster

Comparing performance of: Array.prototype.find vs Array.prototype.findIndex

Created: 3 years ago by: Guest

Jump to the latest result

Array.prototype.find

Array.prototype.findIndex

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):