Benchmark: find vs some in us.js

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>

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
_.find(data, x=>x.username==='titi')
_.some
_.some(data, x=>x.username==='titi')

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:

No previous run results

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

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I'll break down the explanation into smaller sections to make it easier to understand.

**Benchmark Overview**

The provided benchmark is designed to compare the performance of two JavaScript functions: `_.find` and `_.some`, both from the Underscore.js library. The benchmark creates a large array of objects with different usernames, then tests which function can find or check for an object with a specific username ('titi') in the shortest amount of time.

**Script Preparation Code**

The script preparation code generates a large array (`data`) with 5000 objects, each having a 'username' property. The first 2 objects have the username 'toto', and the next 2500 objects have the username 'toto' again, interleaved with one object that has the username 'titi'. This creates a mix of data that both functions need to search through.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Underscore.js library version 1.8.3. Underscore.js is a utility library for JavaScript that provides functional programming helpers, including `_.find` and `_.some`.

**Test Cases**

There are two test cases:

* **_.find**: Tests the performance of the `_.find` function to find an object with a specific username ('titi').
* **_.some**: Tests the performance of the `_.some` function to check if any object in the array has a specific property (in this case, 'username' equals 'titi').

**Comparison Options**

The benchmark compares the performance of two options:

1. Using the `_.find` function: This function returns the first element that satisfies the provided condition (i.e., the first object with the username 'titi').
2. Using the `_.some` function: This function returns a boolean value indicating whether any element in the array satisfies the provided condition (in this case, if any object has the username 'titi').

**Pros and Cons of Each Approach**

* **_.find**: Pros:
	+ Returns the first matching element, which can be useful in certain situations.
	+ Can be faster for smaller arrays or when only one match is expected.
Cons:
	+ May return `undefined` if no elements are found, requiring additional checks.
	+ May not be as efficient as `_.some` for large arrays with multiple matches.
* **_.some**: Pros:
	+ Returns a boolean value indicating whether any element matches the condition.
	+ Can be faster than `_.find` for large arrays with multiple matches.
Cons:
	+ Does not return an actual matching element, but rather a boolean result.

**Device and Browser Factors**

The benchmark results are reported for Firefox 96 on a Desktop platform running Fedora. This means that any results or observations made on this specific combination of browser, device, and operating system may not be directly applicable to other setups.

**Alternatives**

Other alternatives to the Underscore.js library or these specific functions include:

* Vanilla JavaScript: Implementing the same functionality without relying on an external library.
* Other utility libraries like Lodash (similar to Underscore.js) or Ramda.
* In-house custom implementations of `_.find` and `_.some`.

Note that these alternatives would require re-implementing the benchmark code with the new functions or logic.

Related benchmarks:

find vs some in us.js (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

No previous run results

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