Benchmark: Some vs. Filter vs. indexOf vs. Includes vs. Find in Object

Script Preparation code:

var array = [];
for (var i = 0; i < 10000; i++) {
  array.push({value: { value: Math.floor(Math.random() * 1000)}});
}
array.push({value: { value: 42}});

Tests:

Array.some
var tempResult = array.some(v => v.value.value === 42)
Array.filter
var tempResult = array.filter(v => v.value.value === 42);
Array.indexOf
var tempResult = array.indexOf({value: {value: 42}}) > -1;
Array.includes
var tempResult = array.includes(v => v.value.value === 42);
Array.find
var tempResult = array.find(v => v.value.value === 42);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0

Browser/OS: Chrome 122 on Windows

View result in a separate tab

Test name	Executions per second
Array.some	2136128.2 Ops/sec
Array.filter	21674.8 Ops/sec
Array.indexOf	194630.0 Ops/sec
Array.includes	9053109.0 Ops/sec
Array.find	1116909.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

The provided benchmark compares four different methods for searching for a value within an array in JavaScript:

1. `some()`
2. `filter()`
3. `indexOf()`
4. `includes()` (new in ECMAScript 2019)

**Options Compared:**

*   `some()`: Returns `true` if at least one element passes the provided test.
*   `filter()`: Creates a new array with all elements that pass the provided test.
*   `indexOf()`: Returns the index of the first occurrence of the specified value in the array. If the value is not found, it returns -1.
*   `includes()`: Returns `true` if the array includes the element at the specified index.

**Pros and Cons:**

*   **some():**
    *   Pros:
        *   More concise and expressive than other methods
        *   Can be more efficient for large arrays since it stops as soon as it finds a match
    *   Cons:
        *   Returns `true` or `false`, which might not be what you want if the method is expected to return an index or value
*   **filter():**
    *   Pros:
        *   Creates a new array with all matching elements, which can be useful in some cases
        *   Can be more efficient than other methods for small arrays since it only iterates over the elements that match the test
    *   Cons:
        *   Returns an array, not just the index or value of the first match
*   **indexOf():**
    *   Pros:
        *   Returns the exact index of the first occurrence of the specified value
    *   Cons:
        *   Can be slower than other methods since it has to scan the entire array to find a match
*   **includes():**
    *   Pros:
        *   Fast and efficient for most cases
        *   Returns `true` or `false`, which might be what you want in some cases
    *   Cons:
        *   Less expressive than other methods, since it doesn't return an index or value

**Library/Functionality Descriptions:**

*   None explicitly mentioned in the benchmark definition.

**Special JavaScript Feature/Syntax (if applicable):**
None explicitly mentioned.

**Other Considerations:**

*   When choosing a method for searching within an array, consider the specific requirements of your use case. If you need to find the index or value of the first match, `indexOf()` might be the best choice. However, if you want to stop as soon as you find a match and return `true` or `false`, `some()` could be a better option.
*   For small arrays, `filter()` can be more efficient since it only iterates over the elements that match the test.
*   The `includes()` method is generally fast and efficient but might not be as expressive as other methods.

**Alternatives:**

*   Other array methods that could be used for this purpose include:
    *   `forEach()`: Iterates over each element in the array, which can be useful if you need to perform some operation on each match.
    *   `map()`: Creates a new array with the results of applying the provided function on each element in the original array. This might not be what you want if you're just looking for a specific value within the array.
*   For more complex search operations, other libraries or frameworks like Lodash might provide more convenient and expressive functions for searching within arrays.

In conclusion, when choosing a method for searching within an array in JavaScript, consider your specific requirements and choose the most suitable option based on factors such as performance, expressiveness, and readability.

Related benchmarks:

Some vs. Filter vs. indexOf vs. Includes vs. Find in Object (version: 0)

Searching for value in object in array.

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

Created: 2 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Array.includes

Array.find

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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