Benchmark: findindex vs some 3

Script Preparation code:

var userEmails = [ { email: 'teste@teste.com' }, { email: 'teste2@teste.com', type: 'personal' }, { email: 'teste3@teste.com' } ];

Tests:

some
userEmails.some(el => el.type === 'personal');
findindex
userEmails.findIndex(i => i.type === "personal") >= 0;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
some
findindex

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36

Browser/OS: Chrome 80 on Mac OS X 10.15.3

View result in a separate tab

Test name	Executions per second
some	12193521.0 Ops/sec
findindex	12166605.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, compared, and discussed.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking test case on MeasureThat.net. The test is designed to compare the performance of two approaches: using `Array.prototype.some()` versus `Array.prototype.findIndex()`. Both methods are used to find an element in an array that meets a certain condition.

**Options Compared**

Two options are compared:

1. **`some()`**: This method returns a boolean value indicating whether at least one element in the array passes the test.
2. **`findIndex()`**: This method returns the index of the first element in the array that passes the test, or -1 if no elements pass.

**Pros and Cons**

Here's a brief analysis of each approach:

* **`some()`**:
	+ Pros: Simple to implement, can be more efficient for small arrays, and allows early exit.
	+ Cons: May return false positives if multiple elements match the condition.
* **`findIndex()`**:
	+ Pros: Returns the actual index of the element, allowing for easier indexing into the array.
	+ Cons: May return -1 if no elements pass, requiring additional checks to handle this case.

**Library and Purpose**

There is no explicit library mentioned in the benchmark. However, `Array.prototype.some()` and `Array.prototype.findIndex()` are built-in JavaScript methods, making them part of the ECMAScript standard.

**Special JS Feature or Syntax**

The `some()` method uses a callback function with the following syntax:
```javascript
arr.some(callback)
```
This is a shorthand way to call the `some()` method. The callback function takes two arguments: the current element being tested (`el`) and the index of that element in the array (optional).

**Benchmark Preparation Code**

The script preparation code creates an array `userEmails` with three elements, each containing an `email` property and optionally a `type` property.

```javascript
var userEmails = [
  { email: 'teste@teste.com' },
  { email: 'teste2@teste.com', type: 'personal' },
  { email: 'teste3@teste.com' }
];
```

**Individual Test Cases**

The benchmark consists of two test cases:

1. **`some()`**: Tests the `some()` method with a callback function that checks if an element's `type` property is equal to `'personal'`.
2. **`findIndex()`**: Tests the `findIndex()` method with a callback function that checks if an element's `email` property is equal to `'teste2@teste.com'`.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are some options:

* Using `Array.prototype.includes()` instead of `some()`.
* Using `Array.prototype.indexOf()` instead of `findIndex()`, but keep in mind that it returns the index or -1 if not found.
* Using other libraries like Lodash or Underscore.js, which provide similar methods with additional features and optimizations.

Keep in mind that benchmarking is an art, and the best approach may depend on your specific use case, performance requirements, and target audience.

Related benchmarks:

findindex vs some 3 (version: 0)

Comparing performance of: some vs findindex

Created: 4 years ago by: Guest

Jump to the latest result

some

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):