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slice vs new allocation3
(version: 0)
Comparing performance of:
Slice vs slice and save vs slice and renew
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr = []; for (let i = 0; i < 1000000; i++) { arr.push(i); }
Tests:
Slice
for (let i = 0; i < 1000; i++) { arr.slice(i * 10, 1000) }
slice and save
const arr = []; for (let i = 0; i < 1000; i++) { arr.push(arr.slice(i * 10, 1000)) }
slice and renew
const arr = []; for (let i = 0; i < 1000; i++) { arr.push(Array.from(arr.slice(i * 10, 1000))) }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Slice
slice and save
slice and renew
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data to understand what is being tested in this JavaScript microbenchmark. **Benchmark Definition** The benchmark definition describes a set of tests designed to compare three different approaches for slicing an array: 1. **Original Approach**: `arr.slice(i * 10, 1000)` 2. **Save and Create New Array**: `arr.push(arr.slice(i * 10, 1000))` 3. **Create a New Array and Slice**: `Array.from(arr.slice(i * 10, 1000))` **Options Compared** The three approaches differ in how they handle the slicing of the array: * **Original Approach**: Slices the original array `arr` directly. * **Save and Create New Array**: Creates a new array by pushing a slice of `arr` into itself. This approach creates multiple temporary arrays during execution. * **Create a New Array and Slice**: Uses the `Array.from()` method to create a new array from the sliced portion of `arr`. This approach also creates a new array, but it does so more efficiently than the "Save and Create New Array" approach. **Pros and Cons** * **Original Approach**: + Pros: Minimal overhead in creating temporary arrays. + Cons: May not be as efficient due to direct slicing of the original array. * **Save and Create New Array**: + Pros: Can be faster than the "Original Approach" due to caching effects. + Cons: Creates multiple temporary arrays during execution, leading to increased memory allocation and deallocation overhead. * **Create a New Array and Slice**: + Pros: More efficient than the "Save and Create New Array" approach by avoiding unnecessary array allocations. + Cons: Requires using the `Array.from()` method, which may incur additional overhead for some browsers. **Library Usage** There is no explicit library usage in this benchmark. However, it's worth noting that some browsers might have internal optimizations or caching mechanisms that affect the performance of these approaches. **Special JS Features or Syntax** This benchmark does not explicitly use any special JavaScript features or syntax. The test cases are straightforward and utilize standard array methods like `slice()` and `push()`, as well as the `Array.from()` method. **Other Alternatives** If you were to modify this benchmark, alternative approaches could include: * Using `splice()` instead of `slice()` * Utilizing `map()` or `reduce()` for array slicing * Implementing custom array allocation and deallocation algorithms * Comparing different caching strategies or optimizations Keep in mind that any modifications would require significant changes to the benchmark definition and test cases.
Related benchmarks:
slice vs new allocation
slice vs new allocation1
slice vs new allocation2
Array Slicing
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