Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array contain
(version: 0)
Comparing performance of:
Array.indexOf vs Array.some vs Array.every vs Array.findIndex vs Array.filter
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var a = [true, true, true, true, true, true, true];
Tests:
Array.indexOf
a.indexOf(false) === -1;
Array.some
!a.some(i => i === false);
Array.every
a.every(i => i === true);
Array.findIndex
a.findIndex(i => i === false) === -1;
Array.filter
a.filter(i => i === false).length === 0;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (5)
Previous results
Fork
Test case name
Result
Array.indexOf
Array.some
Array.every
Array.findIndex
Array.filter
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the provided JSON and explain what's being tested. **Benchmark Definition** The benchmark definition is for an array of `true` values containing seven elements. The preparation code initializes this array with the following line: ```javascript var a = [true, true, true, true, true, true, true]; ``` This prepares a sample data set to run performance tests on. **Individual Test Cases** There are five test cases being compared in this benchmark: 1. **Array.indexOf** * Benchmark Definition: `a.indexOf(false) === -1;` * This test checks the performance of the `indexOf()` method when searching for an element (`false`) that is not present in the array. 2. **Array.some** * Benchmark Definition: `!a.some(i => i === false);` * This test measures the performance of the `some()` method, which returns a boolean indicating whether at least one element in the array meets the condition (in this case, being equal to `false`). The `!` operator negates the result. 3. **Array.every** * Benchmark Definition: `a.every(i => i === true);` * This test checks the performance of the `every()` method, which returns a boolean indicating whether all elements in the array meet the condition (in this case, being equal to `true`). 4. **Array.findIndex** * Benchmark Definition: `a.findIndex(i => i === false) === -1;` * This test measures the performance of the `findIndex()` method when searching for an element (`false`) that is not present in the array. 5. **Array.filter** * Benchmark Definition: `a.filter(i => i === false).length === 0;` * This test checks the performance of the `filter()` method, which creates a new array with elements that meet the condition (in this case, being equal to `false`). The length of the resulting array is checked against an expected value. **Library/Feature Usage** None of these tests use any external libraries or special JavaScript features beyond what's available in standard ECMAScript. However: * The `some()`, `every()`, `findIndex()`, and `filter()` methods are all part of the standard Array prototype. * The arrow function syntax (`i => i === false`) is a shorthand for defining simple functions, which has been a part of JavaScript since 2015 (ECMAScript 6). **Pros/Cons of Different Approaches** Each method being tested has its strengths and weaknesses: * **indexOf()**: Fast when searching for an element that might be present in the array. Returns `-1` if not found. * **some()**, **every()**, and **filter()**: Can be slower than `indexOf()` since they iterate over the entire array, but provide more flexibility by allowing multiple conditions or transformations to be applied. **Alternatives** Other alternatives for finding an element in an array include: * Manual iteration with a loop * Using `find()` (which is similar to `findIndex()`) * Converting the array to a Set and using the `has()` method These alternatives can be useful depending on specific use cases or performance requirements. However, this benchmark focuses on comparing the built-in methods' performance.
Related benchmarks:
Boolean Operators
isArray test 1213
Array.isArray vs truthy
doubleNot vs Boolean array filter
Check array deez nuts
Comments
Confirm delete:
Do you really want to delete benchmark?