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(version: 0)
Comparing performance of:
splice vs slice
Created:
5 years ago
by:
Guest
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Script Preparation code:
var list = []; for (var i = 0; i < 1000 * 1000; i++) { list.push(i); }
Tests:
splice
for (var i = 0; i < 100; i++) { list.push(i); } var spliceTemp = list.splice(100)
slice
for (var i = 0; i < 100; i++) { list.push(i); } var sliceTemp = list.slice(0, 100) list = list.slice(100)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
splice
slice
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** MeasureThat.net is a platform that allows users to create and run JavaScript microbenchmarks. In this specific benchmark, two different approaches are being compared: using the `splice()` method and using the `slice()` method. **Options compared** The two options being compared are: 1. **Splice**: The `splice()` method modifies the original array by removing and replacing elements at a specified index. 2. **Slice**: The `slice()` method returns a shallow copy of a portion of an array. **Pros and Cons of each approach:** * **Splice:** + Pros: - Can be more efficient for large arrays, as it only needs to modify the original array. - Can be faster for certain use cases, such as when removing elements from the beginning or end of an array. + Cons: - Modifies the original array, which can have unintended side effects if not intended. - Can be slower than `slice()` for small arrays, due to the overhead of modifying the original array. * **Slice:** + Pros: - Returns a new array without modifying the original array, preserving its integrity. - Faster and more predictable performance, especially for small arrays. + Cons: - Creates a new array with references to elements from the original array, which can lead to memory leaks if not handled properly. **Library usage** In this benchmark, no external libraries are being used. However, it's worth noting that `splice()` and `slice()` are built-in JavaScript methods, so they do not require any additional imports or setup. **Special JS features/syntax** This benchmark does not use any special JavaScript features or syntax beyond the standard language. It only uses basic JavaScript syntax to define the array and perform operations on it. **Other alternatives** If you wanted to measure the performance of alternative approaches, you could consider the following: * **Array.prototype.filter()**: Instead of using `splice()` or `slice()`, you could use `filter()` to remove elements from the beginning or end of the array. This approach would require a new array and may have different performance characteristics. * **Array.prototype.map() and Array.prototype.reduce()**: You could also explore using `map()` or `reduce()` to manipulate the array, which might offer different performance benefits depending on the specific use case. However, for this particular benchmark, the focus is on comparing the performance of `splice()` and `slice()`, so alternative approaches are not being explicitly tested.
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