Benchmark: Filter vs Find vs Some

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:

Filter
data.filter(e => e.username === 'titi')
Find
data.find(e => e.username === 'titi')
Some
data.some(e => e.username === 'titi')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Filter
Find
Some

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Filter	88504.7 Ops/sec
Find	217470.8 Ops/sec
Some	213987.2 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark is designed to compare the performance of three different methods for filtering or searching an array in JavaScript: `filter()`, `find()`, and `some()`.

**Script Preparation Code**

The script preparation code generates an array `data` with 7,500 elements, consisting of two types of objects: one with a `username` property set to `'toto'` (pushed 5,000 times) and another with a `username` property set to `'titi'` (pushed 2,500 times).

**Benchmark Definition JSON**

The benchmark definition JSON defines three individual test cases:

1. **Filter**: `data.filter(e => e.username === 'titi')`
2. **Find**: `data.find(e => e.username === 'titi')`
3. **Some**: `data.some(e => e.username === 'titi')`

**Performance Comparison**

The benchmark compares the performance of each method on the generated dataset. The results are reported in terms of executions per second (ExecutionsPerSecond) for each browser and device platform.

**Method Comparison**

Here's a brief overview of each method and their pros and cons:

1. **Filter()**
	* Pros:
		+ Returns an array with elements that pass the test.
		+ Allows for more control over filtering conditions.
	* Cons:
		+ Can be slower than `find()` or `some()` because it creates a new array.
2. **Find()**
	* Pros:
		+ Faster than `filter()` since it returns the first matching element directly.
		+ Returns an object (not an array) if found, which can be useful for caching purposes.
	* Cons:
		+ Throws an error if no elements are found.
3. **Some()**
	* Pros:
		+ Faster than `filter()` since it returns as soon as the first matching element is found.
	* Cons:
		+ Returns a boolean value (`true` or `false`) instead of the actual matching element.

**Library and Special JavaScript Features**

None of the methods rely on external libraries, but some specific JavaScript features are used:

1. **Arrow functions**: Used in all three methods to define concise, lambda-like functions.
2. **Template literals**: Used in the script preparation code to create string literals with placeholders for dynamic values.

**Other Alternatives**

If you need more control over filtering or want to avoid returning an array, consider using other methods:

1. **Every()**: Similar to `filter()`, but returns a boolean value indicating whether all elements pass the test.
2. **forEach()`: Executes a callback function on each element in the array without modifying the original data.

Keep in mind that these alternatives may have different performance characteristics and use cases compared to `filter()`, `find()`, and `some()`.

Related benchmarks:

Filter vs Find vs Some (version: 0)

Bench

Comparing performance of: Filter vs Find vs Some

Created: 4 years ago by: Guest

Jump to the latest result

Filter

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):