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IndexOf vs FindIndex 2
(version: 0)
Comparing performance of:
FindIndex vs indexOf
Created:
6 years ago
by:
Guest
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Script Preparation code:
var arr = [1, 'a', 'b'];
Tests:
FindIndex
function check(item) { return item === 'b'; } arr.findIndex(check)
indexOf
arr.indexOf('b');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
FindIndex
indexOf
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the MeasureThat.net benchmark. **Benchmark Definition** The benchmark is designed to compare the performance of two different methods: `indexOf` and `findIndex`. The `indexOf` method searches for the first occurrence of a specified value within an array, while `findIndex` achieves the same goal but returns the index of the first element that satisfies a provided callback function. **Options Compared** The two options being compared are: 1. **`arr.indexOf('b')`**: This method uses the built-in `indexOf` function to search for the string `'b'` within the array `arr`. It's a simple and straightforward approach. 2. **`arr.findIndex(check)`**: This method uses the built-in `findIndex` function, which calls a callback function (`check`) on each element of the array until it finds one that returns `true`. **Pros and Cons** **1. `arr.indexOf('b')`:** Pros: * Simple to implement * Fast and efficient for small arrays or exact string matches Cons: * May not work correctly if the search value is not a string (e.g., searching for numbers) * Does not handle null or undefined values in the array **2. `arr.findIndex(check)`:** Pros: * More flexible, as it can handle non-string search values and returns an index regardless of whether the element exists * Can be used for more complex searches by defining a custom callback function Cons: * Slower than `indexOf` due to the additional overhead of calling a callback function on each element * May not perform as well for very large arrays or exact string matches **Library and Purpose** None mentioned in this specific benchmark. However, if you're interested in exploring other libraries that provide similar functionality, some notable ones include: * Lodash: Provides `findIndex` and other utility functions. * Underscore.js: Also provides `findIndex` and other utility functions. **Special JS Features or Syntax** The test uses the `findIndex` method with a callback function (`check`). The syntax for this is specific to JavaScript, where the `findIndex` method takes two arguments: ```javascript arr.findIndex(callback) ``` In this case, `callback(item)` returns `true` when it finds the desired element.
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