Benchmark: Some vs. Filter vs. indexOf vs. Find

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:

Array.some
var tempResult = !!Math.round(Math.random()) ? hasZero.some(v => v === 0) : withoutZero.some(v => v === 0);
Array.filter
var tempResult = !!Math.round(Math.random()) ? hasZero.filter(v => v === 0) : withoutZero.filter(v => v === 0);
Array.indexOf
var tempResult = !!Math.round(Math.random()) ? hasZero.indexOf(0) > -1 : withoutZero.indexOf(0) > -1;
Array.find
var tempResult = !!Math.round(Math.random()) ? hasZero.find(v => v === 0) : withoutZero.find(v => v === 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.filter
Array.indexOf
Array.find

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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Let's dive into the benchmark.

**What is being tested?**

The provided JSON represents a JavaScript microbenchmark that tests four different approaches to check if an array contains a specific value (in this case, 0). The arrays are populated with random integers, and the test cases use various methods to find the desired value: `some`, `filter`, `indexOf`, and `find`.

**Options compared**

The benchmark compares the performance of the following options:

1. **Array.some**: This method returns a boolean indicating whether at least one element in the array satisfies the provided condition.
2. **Array.filter**: This method returns a new array with all elements that pass the test implemented by the provided function.
3. **Array.indexOf**: This method returns the index of the first element in the array that passes the test implemented by the provided function, or -1 if no such element exists.
4. **Array.find**: This method returns the value of the first element in the array that satisfies the provided condition, or undefined if no such element exists.

**Pros and cons of each approach**

* **Array.some**: This method is concise and easy to read. However, it may be slower than other methods because it needs to iterate over all elements in the array.
* **Array.filter**: This method is useful when you need a new array with only the desired elements. However, it can be slower than `some` for large arrays, as it needs to create a new array.
* **Array.indexOf**: This method is fast and efficient but may return -1 if no element matches the condition. It's also less flexible than other methods because it returns an index value rather than a boolean or value.
* **Array.find**: This method is concise and easy to read, similar to `some`. However, it may be slower than `indexOf` for very large arrays, as it needs to iterate over all elements.

**Libraries used**

None are explicitly mentioned in the provided JSON. However, the benchmark assumes that the JavaScript engine being tested supports these array methods.

**Special JS features or syntax**

The benchmark does not use any special JavaScript features or syntax beyond standard language features.

**Other considerations**

When writing microbenchmarks like this one, it's essential to consider factors such as:

* The size and distribution of the input data
* The specific requirements of your application (e.g., performance, readability)
* The impact of caching, memoization, or other optimizations on benchmark results

The benchmark results show that Firefox 109 performs best for `Array.indexOf` and `Array.find`, while performing worst for `Array.filter`. This may be due to the optimization strategies employed by the engine.

**Alternatives**

Other approaches you could consider using in your microbenchmarking efforts include:

* Using a testing framework like Jest or Mocha
* Utilizing profiling tools, such as Chrome DevTools or Node.js Inspector
* Exploring alternative programming languages, such as C++ or Rust, for performance-critical code

Related benchmarks:

Some vs. Filter vs. indexOf vs. Find (version: 0)

Comparing performance of: Array.some vs Array.filter vs Array.indexOf vs Array.find

Created: 6 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.find

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):