Benchmark: Some vs. Filter vs. indexOf vs. includes vs. Property accessors

Script Preparation code:

var hasZero = [];
var withoutZero = [];
var useObjectWithZero = {}
var useObjectWithoutZero = {}
for (var i = 0; i < 10000; i++) {
  hasZero.push(Math.floor(Math.random() * 1000));
  withoutZero.push(Math.floor(Math.random() * 1000) + 1)
  useObjectWithZero[Math.floor(Math.random() * 1000)] = Math.floor(Math.random() * 1000)
  useObjectWithoutZero[Math.floor(Math.random() * 1000)+1] = 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.includes
var tempResult = !!Math.round(Math.random()) ? hasZero.includes(0) : withoutZero.includes(0);
Property accessors
var tempResult = !!Math.round(Math.random()) ? useObjectWithZero[0] : useObjectWithoutZero[0];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.filter
Array.indexOf
Array.includes
Property accessors

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):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided benchmark compares four different approaches to check if an element exists in an array or access its value:

1. `Array.some()`
2. `Array.filter()`
3. `Array.indexOf()`
4. `Array.includes()`
5. `Property accessors` (direct property access)

**Options Compared**

Here's a brief explanation of each option:

* **Array.some()**: Returns `true` if at least one element in the array satisfies the provided condition.
* **Array.filter()**: Creates a new array with all elements that pass the provided test.
* **Array.indexOf()**: Returns the index of the first occurrence of the specified value, or -1 if not found.
* **Array.includes()**: Returns `true` if an element with the specified value is present in the array, or `false` otherwise.
* **Property accessors** (direct property access): Directly accesses a property on an object without using any methods.

**Pros and Cons**

Here's a brief overview of the pros and cons of each option:

* **Array.some()**:
	+ Pros: Simple and concise, can be used for array checking.
	+ Cons: Can be slower than other options due to the loop structure.
* **Array.filter()**:
	+ Pros: Can create a new array with filtered elements, useful for transformations.
	+ Cons: Creates an additional object, which can lead to memory overhead.
* **Array.indexOf()**:
	+ Pros: Fast and efficient, returns the index of the first occurrence.
	+ Cons: Returns -1 if not found, requiring additional checks.
* **Array.includes()**:
	+ Pros: Simple and concise, similar to Array.some().
	+ Cons: Can be slower than indexOf() for large arrays due to the comparison loop.
* **Property accessors** (direct property access):
	+ Pros: Fast and efficient, direct access to properties without methods.
	+ Cons: Limited to objects with properties; not applicable for array or other data structures.

**Library Used**

The benchmark uses the following libraries:

* None explicitly mentioned in the provided code, but it's likely that MeasureThat.net provides a built-in implementation of these functions or uses a version of V8 (Google's JavaScript engine) that includes these functions.

**Special JS Features/Syntax**

None are used in this benchmark.

**Benchmark Preparation Code**

The script preparation code creates arrays with 10,000 elements each and populates them with random values. This setup is likely designed to minimize variations in execution time between different browsers and hardware configurations.

**Alternatives**

Some alternative approaches that could be explored include:

* Using `Array.every()` for checking all elements in an array.
* Implementing custom binary search algorithms for arrays or objects.
* Utilizing specialized data structures like sets or maps for fast lookup and insertion operations.
* Leveraging native WebAssembly (WASM) modules for performance-critical components.

Keep in mind that the choice of approach depends on the specific requirements and constraints of your project, such as memory usage, execution time, and compatibility with various browsers and hardware configurations.

Related benchmarks:

Some vs. Filter vs. indexOf vs. includes vs. Property accessors (version: 0)

Comparing performance of: Array.some vs Array.filter vs Array.indexOf vs Array.includes vs Property accessors

Created: 4 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.includes

Property accessors

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):