Benchmark: Some vs Find vs For

Script Preparation code:

var data = []

for (let i = 0; i < 5000; ++i) data.push({ username: 'toto' })
data.push({ username: 'titi' })
for (let i = 0; i < 2500; ++i) data.push({ username: 'toto' })

Tests:

Find
data.find(e => e.username === 'titi')
Some
data.some(e => e.username === 'titi')
FOR
function test() { for(let i = 0; i < data.length; i++) { if(data[i].username === 'titi') { return true; } } return false; } test();

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Find

107K/s

Some

104K/s

FOR

88K/s

Fastest: Find (1.2x faster)

View exact numbers

✓ Find: 107,182 ops/sec
• Some: 103,692 ops/sec
• FOR: 87,879 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Find
Some
FOR

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Browser/OS: Chrome 147 on Windows

View result in a separate tab

Some

74K/s

FOR

63K/s

Find

62K/s

View exact numbers

Test name	Executions per second
✓ Some	73,662 Ops/sec
FOR	62,709 Ops/sec
Find	61,750 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested.

**Benchmark Overview**

The benchmark measures the performance of three different approaches to check if an element in an array matches a certain condition:

1. `find(e => e.username === 'titi')`
2. `some(e => e.username === 'titi')`
3. A manual loop that iterates through the array and checks each element's property

**Library Used**

In this benchmark, the Array.prototype methods `find()` and `some()` are used, which are built-in functions in JavaScript.

**`find()` Method**

The `find()` method returns the first element in an array that satisfies a given condition. In this case, it checks if any element's `username` property is equal to `'titi'`. The purpose of `find()` is to find the first matching element in the array and return it.

**Pros:**

* Efficient, as it stops iterating as soon as a match is found
* Simplifies code, as you don't need to check every element

**Cons:**

* May be slower for large arrays if an exact match is not found (because of the overhead of searching)
* Does not guarantee that the first matching element will be returned (in case of ties)

**`some()` Method**

The `some()` method returns a boolean value indicating whether at least one element in an array satisfies a given condition. In this case, it checks if any element's `username` property is equal to `'titi'`. The purpose of `some()` is to determine if there is even one matching element in the array.

**Pros:**

* More efficient than manual loops for large arrays
* Guarantees that at least one element will be returned

**Cons:**

* May not be as efficient as `find()` for small arrays (because of the overhead of searching)
* Does not guarantee that the first matching element will be returned

**Manual Loop**

The manual loop iterates through each element in the array and checks if its `username` property is equal to `'titi'`. The purpose of this approach is to manually check every element, regardless of how many matches there may be.

**Pros:**

* Guarantees that all elements will be checked
* Does not require any built-in functions

**Cons:**

* Inefficient for large arrays (because of the overhead of iterating through every element)
* More complex code

**Other Alternatives**

If you needed to implement a loop-like behavior, other alternatives could include:

* `every()` method: Returns true if all elements in an array satisfy a given condition
* Regular expressions (regex): Can be used to search for patterns in strings
* Custom implementation using loops or recursive functions

In general, the choice of approach depends on the specific requirements and constraints of your use case.

Some vs Find vs For (version: 0)

Comparing performance of: `Find vs Some vs FOR`

Created: 5 years ago by: Guest

Go to the latest result

Find

Some

FOR

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Some vs Find vs For (version: 0)

Comparing performance of: Find vs Some vs FOR

Created: 5 years ago by: Guest

Go to the latest result

Find

Some

FOR

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Find vs Some vs FOR`