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slice vs set javascript
(version: 0)
Comparing performance of:
slice vs set
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var array = new Array(100).map((a, i) => i) var set = new Set(array)
Tests:
slice
array = array.slice(1, 0)
set
set.delete(1)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
slice
set
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. **Benchmark Overview** The benchmark is designed to compare the performance of `Array.prototype.slice()` and `Set` data structures in JavaScript. The test creates an array with 100 elements, maps each element to its index, and then passes this array to both `slice()` and `set()` methods. **Options Compared** There are two main options being compared: 1. **Array.prototype.slice()**: This method returns a new array containing all elements from the original array, starting at the specified index (in this case, 1) and going to the end of the array. 2. **Set**: This is a built-in JavaScript data structure that stores unique values. In this test, an empty set is created and populated with the array elements. **Pros and Cons** * **Array.prototype.slice()**: + Pros: Efficient for large datasets, as it only returns references to existing elements. + Cons: Can be slower than `Set` for small to medium-sized arrays due to its overhead in creating a new array. * **Set**: + Pros: Fast and efficient for adding or removing elements, especially when dealing with unique values. + Cons: May perform worse than `slice()` for large datasets, as it needs to iterate over all elements. **Library/Utility** In this test case, there is no specific library or utility being used beyond the built-in JavaScript `Array` and `Set` types. However, if we consider the `map()` method used in the script preparation code, it's worth noting that `map()` is a part of the ECMAScript specification and has been supported by most modern browsers for many years. **Special JS Features/Syntax** There are no special JavaScript features or syntax being tested in this benchmark. The focus is solely on comparing the performance of two built-in data structures (`Array.prototype.slice()` and `Set`). **Other Alternatives** If you were to design a similar benchmark, you might also consider testing: 1. **Array.prototype.forEach()**: This method iterates over an array without returning any values. 2. **Array.prototype.reduce()**: This method reduces an array to a single value using a callback function. 3. **Object.create() vs Object.assign()**: These two methods create new objects and can be used in place of `Set` for storing unique values. Keep in mind that the specific alternatives will depend on your goals and requirements for testing JavaScript performance.
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