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Array.splice vs Array.filter
(version: 0)
Test a speed difference between these 2 approaches
Comparing performance of:
Splice It vs filter It
Created:
3 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script> const array = ["first","second","third","asdawd","cxzcas","ljjjln","dfh93fsad9","asdfeh5","dsag442","gdsgds","fdsfrhdgr"]; </script>
Script Preparation code:
function spliceIt(array, elementIdx){ array.splice(elementIdx, 1); } function filterIt(array, elementIdx){ array = array.filter((el, idx) => idx !== elementIdx); }
Tests:
Splice It
spliceIt(array, 5);
filter It
filterIt(array, 5);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Splice It
filter It
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
3 months ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0
Browser/OS:
Firefox 146 on Linux
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Embed Benchmark Result
Test name
Executions per second
Splice It
11562108.0 Ops/sec
filter It
16260531.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested. **Benchmark Definition** The benchmark is testing two approaches to remove an element from an array: 1. `spliceIt(array, elementIdx)`: This function uses the `splice()` method of the array to remove the element at the specified index. 2. `filterIt(array, elementIdx)`: This function creates a new array by filtering out elements that don't match the condition `(el, idx => idx !== elementIdx)`. **Options being compared** The two approaches are being compared directly in this benchmark. **Pros and Cons of each approach:** 1. **`spliceIt()`**: * Pros: + Directly removes the element from the original array. + Can be more efficient if only one element needs to be removed, as it avoids creating a new array. * Cons: + Modifies the original array. + May have performance issues if the array is large and many elements need to be removed. 2. **`filterIt()`**: * Pros: + Does not modify the original array (returns a new one). + Can be more memory-efficient for large arrays, as it avoids modifying the original data. * Cons: + Creates a new array with filtered elements. + May have performance issues if many elements need to be removed or rearranged. **Library and syntax used** In this benchmark, no external library is being used. The `splice()` method and arrow functions are built-in JavaScript features. The test case uses special syntax: * Arrow function `(el, idx => idx !== elementIdx)` in the `filterIt()` function. + This is an example of a concise way to define a small anonymous function using an arrow function expression. **Other alternatives** If you wanted to write this benchmark differently, here are some alternative approaches: 1. Use `slice()`: Instead of `splice()`, you could use `array.slice(elementIdx, elementIdx + 1)` to remove the single element. 2. Use `forEach()` and `indexOf()`: You could iterate through the array using `forEach()` and find the index of the element using `indexOf()`. Then, you can delete the element at that index. 3. Use a different data structure: If you wanted to optimize performance for large arrays, you could consider using a data structure like a linked list or a heap. Keep in mind that these alternative approaches may have different trade-offs and might not be as efficient as the original code.
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