Benchmark: Some vs. Filter vs. findIndex again

Script Preparation code:

var hasZero = [];
var withoutZero = [];
for (var i = 0; i < 10000; i++) {
  hasZero.push(Math.floor(Math.random() * 1000));
  withoutZero.push(Math.floor(Math.random() * 1000) + 1)
}

Tests:

some test
var tempResult = !!Math.round(Math.random()) ? hasZero.some(v => v === 0) : withoutZero.some(v => v === 0);
filter test
var tempResult = !!Math.round(Math.random()) ? hasZero.filter(v => v === 0) : withoutZero.filter(v => v === 0);
findIndex test
var tempResult = !!Math.round(Math.random()) ? hasZero.findIndex((i) => i == 0) > -1 : withoutZero.findIndex((i) => i == 0) > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
some test
filter test
findIndex test

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Linux

View result in a separate tab

Test name	Executions per second
some test	359965.7 Ops/sec
filter test	54321.6 Ops/sec
findIndex test	322184.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**
The benchmark is comparing three ways to check if an array contains at least one zero value: using `some()`, `filter()`, and `findIndex()`.

**Test Case 1: `some`**

* The script preparation code creates two arrays, `hasZero` and `withoutZero`, with 10,000 elements each. `hasZero` has a mix of zeros and non-zeros, while `withoutZero` only has non-zero values.
* The benchmark definition uses the `some()` method to check if at least one element in either array is equal to zero.

**Pros:**

* Simple and concise syntax
* Fast iteration over arrays

**Cons:**

* May return false positives if an empty array is passed as an argument
* Less intuitive than other methods for this specific use case

**Test Case 2: `filter()`**

* The script preparation code remains the same as above.
* The benchmark definition uses the `filter()` method to create a new array with only the elements that are equal to zero.

**Pros:**

* More explicit and controlled iteration over arrays
* Can be more efficient than `some()` for large arrays

**Cons:**

* Creates a new array, which can be memory-intensive
* May be slower than `some()` due to the overhead of creating a new array

**Test Case 3: `findIndex()` followed by a conditional check**

* The script preparation code remains the same as above.
* The benchmark definition uses `findIndex()` to find the index of the first zero element in either array. If the index is greater than -1, it returns true; otherwise, it returns false.

**Pros:**

* More explicit and controlled iteration over arrays
* Can be more efficient than `some()` for large arrays

**Cons:**

* May be slower than `filter()` due to the overhead of finding an index
* Requires a conditional check to return true or false

**Libraries used**
None are explicitly mentioned in the benchmark definition, but it's likely that the `Array.prototype.some()`, `Array.prototype.filter()`, and `Array.prototype.findIndex()` methods are being tested.

**Special JavaScript features or syntax**
The use of template literals (`"var tempResult = !!Math.round(Math.random()) ? hasZero.some(v => v === 0) : withoutZero.some(v => v === 0);"`), arrow functions (`(i) => i == 0`), and the `??` operator (implied by the ternary operator, but not explicitly used in this example) are modern JavaScript features.

**Other alternatives**
There may be other ways to implement these checks, such as using `indexOf()` or `includes()`, but `some()`, `filter()`, and `findIndex()` are commonly used and efficient methods for this specific use case.

As a side note, it's worth mentioning that the benchmark results indicate that `findIndex()` is the fastest method, followed by `some()`, and then `filter()`. This may be due to the optimized implementation of these methods in modern browsers.

Related benchmarks:

Some vs. Filter vs. findIndex again (version: 1)

Comparing performance of: some test vs filter test vs findIndex test

Created: 6 years ago by: Registered User

Jump to the latest result

some test

filter test

findIndex test

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):