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Test Array filter speed with(out) splice
(version: 0)
Comparing performance of:
Only array vs With slice & Filter vs Array with with slice
Created:
3 years ago
by:
Guest
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Tests:
Only array
const testArray = Array(1e5).fill(true)
With slice & Filter
const testArray = Array(1e5).fill(true) const newTestArray = testArray.slice(0, 8e4).filter(e=>e);
Array with with slice
const testArray = Array(1e5).fill(true) const newTestArray = testArray.slice(0, 8e4);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Only array
With slice & Filter
Array with with slice
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 the provided benchmark and explain what's being tested, compared, and their pros/cons. **Benchmark Definition:** The test is designed to measure the speed of array filtering with different approaches in JavaScript. **Options Compared:** There are three options being compared: 1. **Only Array**: This option tests the basic array filtering method without using any additional methods like `slice()`. 2. **Array with Slice & Filter**: This option uses the `slice()` method to create a subset of the original array and then filters that subset. 3. **With Slice Only**: This option uses the `slice()` method to create a subset of the original array, but does not filter it. **Pros/Cons:** * **Only Array**: + Pros: Simplest approach, no extra memory allocation or creation required. + Cons: May be slower due to the need to create a new array with all elements. * **Array with Slice & Filter**: + Pros: More efficient than creating an entirely new array, as it only filters the existing subset. + Cons: Requires additional memory allocation for the `slice()` method and potentially more complex logic. * **With Slice Only**: + Pros: Reduces memory allocation required by using `slice()`, but still creates a subset of the original array without filtering. + Cons: Still requires memory allocation for the subset, which might be a performance bottleneck. **Libraries/Features Used:** None of the options explicitly use any external libraries. However, the benchmark is likely utilizing built-in JavaScript features and optimizations. **Special JS Feature/Syntax:** The `slice()` method is used in two of the options, which is a standard JavaScript feature for creating subsets of arrays. There are no other special features or syntaxes being tested. **Other Alternatives:** If you were to test alternative approaches, some potential options could include: * Using a custom implementation of filtering, such as using `for...of` loops or bitwise operations. * Comparing the performance of different array libraries or frameworks (e.g., Lodash). * Exploring other optimization techniques, such as caching or parallel processing. In summary, this benchmark tests the speed of basic array filtering methods in JavaScript, with varying degrees of complexity and memory allocation. Understanding the pros and cons of each approach can help developers optimize their own code for performance.
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