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Slice vs Pop 1
(version: 0)
Comparing performance of:
Slice vs Pop
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr = [1, 3, 5, 11, 13];
Tests:
Slice
arr.slice(-1);
Pop
arr.pop();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Slice
Pop
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 benchmark definition and test cases. **Benchmark Definition** The provided JSON represents a JavaScript microbenchmark named "Slice vs Pop 1". The benchmark is testing two specific operations: `arr.slice(-1)` and `arr.pop()`. These operations are commonly used in JavaScript to remove or retrieve the last element from an array. **Options being compared** In this benchmark, the two options being compared are: * **`slice()`**: A method that creates a shallow copy of a portion of an array and returns it. In this case, `arr.slice(-1)` is used to create a new array containing only the last element of the original array. * **`pop()`**: A method that removes and returns the last element from an array. **Pros and Cons** ### `slice()` Pros: * Faster than `pop()` because it avoids the overhead of removing elements from the array. It creates a new array, which can be more efficient in terms of memory allocation. * More predictable behavior since it doesn't modify the original array. Cons: * Creates a new array, which can lead to increased memory usage if done frequently. * May not be as optimized by JavaScript engines as `pop()`. ### `pop()` Pros: * More efficient in terms of memory allocation because it modifies the existing array instead of creating a new one. * Optimized by JavaScript engines, which can make it faster for many use cases. Cons: * Modifies the original array, which may not be desirable in some scenarios. * Less predictable behavior since it removes elements from the array without warning. **Library and Special JS Feature** There is no library or special JavaScript feature mentioned in this benchmark. The operations are basic and built-in to the language. **Other Considerations** The benchmark is likely designed to compare the performance of `slice()` and `pop()` in different scenarios, such as: * When dealing with large arrays * When executing these operations frequently * On different types of devices (e.g., mobile vs. desktop) **Alternatives** There are other alternatives for removing or retrieving elements from an array, including: * Using a `for` loop to iterate through the array and remove elements manually * Using the `splice()` method to modify the array * Using a library like Lodash's `takeLast()` function However, these alternatives may not be as optimized by JavaScript engines as `pop()` or `slice()`, making them potentially slower.
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Slice vs Pop vs At(-1)
Slice vs Pop return value
Slice vs Pop copy
Last element slice vs pop
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