Benchmark: Some vs Find 100k items

Script Preparation code:

var data = []

for (let i = 0; i < 50000; ++i) data.push({ username: 'walter' })
data.push({ username: 'Walter' })
for (let i = 0; i < 50000; ++i) data.push({ username: 'walter' })

Tests:

Find
data.find(e => e.username === 'Walter')
Some
data.some(e => e.username === 'Walter')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Find
Some

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0

Browser/OS: Firefox 148 on Windows

View result in a separate tab

Test name	Executions per second
Find	5809.5 Ops/sec
Some	4582.9 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON data and explain what's being tested, compared, and the pros and cons of different approaches.

**Benchmark Overview**

The benchmark measures the performance difference between two JavaScript methods: `find` and `some`, when searching for an item with a specific username (`"Walter"`).

**Script Preparation Code**

The script preparation code creates a large array (`data`) with 50000 elements, each containing a unique `username`. This array is used as input for the benchmark tests.

```javascript
var data = [];
for (let i = 0; i < 50000; ++i) {
    data.push({ username: 'walter' });
}
data.push({ username: 'Walter' });
for (let i = 0; i < 50000; ++i) {
    data.push({ username: 'walter' });
}
```

**Html Preparation Code**

The html preparation code is empty, which means no HTML code is used in the benchmark.

**Individual Test Cases**

There are two test cases:

1. **Find**: This test case uses the `find` method to search for an item with a specific username (`"Walter"`).
2. **Some**: This test case uses the `some` method to check if at least one item in the array has a specific username (`"Walter"`).

**Library Used**

The `some` and `find` methods are built-in JavaScript methods, which means no external library is required.

**Special JS Feature or Syntax**

There's no special feature or syntax used in these benchmark tests. The focus is on comparing the performance of two basic array methods.

**Pros and Cons of Different Approaches**

* **Find**: This method returns the first item that matches the condition, or `undefined` if no match is found. It's faster than `some` because it only needs to iterate over the array once.
	+ Pros: Fast, efficient way to find a single matching element.
	+ Cons: Returns either a value or `undefined`, which may not be desirable in some cases.
* **Some**: This method returns `true` if at least one item matches the condition, and `false` otherwise. It's slower than `find` because it needs to iterate over the array twice (once for each element).
	+ Pros: Returns a boolean value, which can be useful in some cases.
	+ Cons: Slower than `find`, requires more iterations.

**Other Alternatives**

If you wanted to use external libraries or alternative methods, here are a few examples:

* Using Lodash's `some` and `find` functions, which provide additional functionality and options.
```javascript
const _ = require('lodash');
// ...
_.some(data, function(e) { return e.username === 'Walter'; });
_.find(data, function(e) { return e.username === 'Walter'; });
```
* Using a custom implementation of the `some` and `find` methods using loops or recursive functions.
```javascript
function find(data, callback) {
    for (let i = 0; i < data.length; i++) {
        if (callback(data[i])) return data[i];
    }
    return undefined;
}

function some(data, callback) {
    for (let i = 0; i < data.length; i++) {
        if (callback(data[i])) return true;
    }
    return false;
}
```
Keep in mind that these alternatives may introduce additional complexity and overhead.

I hope this explanation helps you understand the benchmark test!

Related benchmarks:

Some vs Find 100k items (version: 0)

Comparing performance of: Find vs Some

Created: 4 years ago by: Guest

Jump to the latest result

Find

Some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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