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JS sada test
(version: 0)
Comparing performance of:
filter vs splice
Created:
3 years ago
by:
Guest
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Tests:
filter
const items = [...Array(1000).keys()] const newItems = items.filter(idx => idx !== 555)
splice
const items = [...Array(1000).keys()] const removeIdx = items.findIndex( item => item === 555) items.splice(removeIdx, 1)
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
filter
splice
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided JSON and explain what's being tested, the options compared, pros and cons of each approach, and other considerations. **Benchmark Definition** The benchmark definition is a simple script that creates an array of 1000 indices using `Array(1000).keys()`, which generates an array with numbers from 0 to 999. The purpose of this script is not explicitly stated, but it's likely used as a common starting point for testing performance differences between two specific methods: `filter()` and `splice()`. **Individual Test Cases** There are two test cases: 1. **Filter**: This test case uses the `filter()` method to remove an index (555) from the array. 2. **Splice**: This test case uses the `splice()` method to remove an index (555) from the array. **Options Compared** In this benchmark, the only option being compared is the performance of using `filter()` versus `splice()`. Both methods are used to remove a specific element from the array. **Pros and Cons of Each Approach:** 1. **Filter()**: * Pros: + More concise and readable code + Less overhead in terms of memory allocation and copying * Cons: + May have higher performance overhead due to the use of a predicate function (in this case, `idx => idx !== 555`) 2. **Splice()**: * Pros: + More efficient in terms of performance, as it modifies the array in-place without creating a new copy * Cons: + Less readable and more verbose code **Other Considerations** In addition to the above points, there are other factors that might affect the performance difference between `filter()` and `splice()`: 1. **Array size**: As the array size increases, `splice()` may become slower due to the overhead of modifying the array in-place. 2. **Browser optimizations**: Different browsers may optimize their internal arrays differently, which can impact performance. **Library Usage** There is no explicit library usage mentioned in the provided benchmark definition or test cases. However, it's worth noting that some browsers (e.g., Chrome) have built-in support for some array methods through the `Array.prototype` object, such as `filter()` and `splice()`. These methods are not libraries per se but rather part of the browser's standard library. **Special JS Features or Syntax** There are no special JavaScript features or syntax mentioned in the provided benchmark definition or test cases.
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