Benchmark: test find vs some

HTML Preparation code:

var data = []

for (let i = 0; i < 5000000; ++i) data.push({ username: 'toto' })
data.push({ username: 'titi' })
for (let i = 0; i < 2500000; ++i) data.push({ username: 'toto' })

Script Preparation code:

var data = []

for (let i = 0; i < 5000000; ++i) data.push({
    username: 'toto'
})
data.push({
    username: 'titi'
})
for (let i = 0; i < 2500000; ++i) data.push({
    username: 'toto'
})

Tests:

a
data.find(e => e.username === 'titi')
b
data.some(e => e.username === 'titi')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
a
b

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser/OS: Firefox 78 on Windows

View result in a separate tab

Test name	Executions per second
a	44.5 Ops/sec
b	41.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases, explaining what's being tested, compared options, pros/cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark is defined by two scripts:

1. `Script Preparation Code`: This script creates an array `data` with 7.5 million objects, each containing a `username` property.
2. `Html Preparation Code`: This script creates the same array `data`, but with a slightly different syntax for object creation.

**Individual Test Cases**

The benchmark consists of two test cases:

1. **Test Case "a" (Find)**: The benchmark definition uses the `find()` method to search for an object in the `data` array that has a `username` property equal to `'titi'`.
2. **Test Case "b" (Some)**: The benchmark definition uses the `some()` method to check if any object in the `data` array has a `username` property equal to `'titi'`.

**Options Compared**

The two methods being compared are:

* `find()`: Returns the first element in the array that satisfies the condition. If no element is found, it returns `undefined`.
* `some()`: Returns a boolean value indicating whether at least one element in the array satisfies the condition.

**Pros and Cons of Each Approach**

### Find()

Pros:

* More efficient for finding a single specific element, as it only iterates over the array once.
* Can be faster for large arrays, since it returns immediately when it finds the first match.

Cons:

* Returns `undefined` if no element is found, which may not be desirable in all cases.
* May have performance overhead due to function call and object lookup.

### Some()

Pros:

* Faster for finding any number of elements that satisfy the condition, as it only iterates over a subset of the array (the ones that match).
* Returns `true` or `false`, making it easier to handle results in the code.

Cons:

* May be slower than `find()` due to the need to iterate over more elements.
* May have performance overhead due to function call and object lookup.

**Library/Tool Considerations**

There is no explicit library or tool mentioned in the benchmark definition. However, both `find()` and `some()` are built-in methods of the Array prototype in JavaScript.

**Special JS Feature/Syntax**

There is no special JS feature or syntax used in this benchmark. The code uses standard JavaScript features, such as arrays, loops, and function definitions.

**Other Alternatives**

If you wanted to compare different search algorithms for finding elements in an array, you could consider alternatives like:

* `forEach()`: Iterates over the array and executes a callback function for each element.
* Custom search algorithms: Implementing your own algorithm using bitwise operations or other techniques to find specific elements.

However, for this specific benchmark, the comparison between `find()` and `some()` is sufficient.

Related benchmarks:

test find vs some (version: 0)

test find vs some

Comparing performance of: a vs b

Created: 2 years ago by: Guest

Jump to the latest result

a

b

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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