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Slice vs Pop and Shift
(version: 0)
Comparing performance of:
Slice vs Pop and Shift
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var array = [1, 2, 3, 4, 5, 6, 7, 8]
Tests:
Slice
array = array.slice(1, array.length - 1)
Pop and Shift
array.pop() array.shift()
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 and Shift
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 benchmark and explain what's being tested. **Benchmark Overview** The benchmark measures the performance of two different approaches for removing elements from an array: using `slice()` with a start and end index, and using `pop()` followed by `shift()`. The goal is to determine which approach is faster in terms of executions per second on different devices running various browsers and operating systems. **Options Compared** The benchmark compares the performance of two approaches: 1. **Slice**: Using `array.slice(1, array.length - 1)` to remove elements from the beginning and end of the array. 2. **Pop and Shift**: Using `array.pop()` followed by `array.shift()` to remove an element from the end of the array. **Pros and Cons** * **Slice**: This approach is more concise and might be preferred for its simplicity. However, it can be slower due to the overhead of creating a new array. * **Pop and Shift**: This approach involves two separate operations, which might lead to better cache locality and potentially faster execution times. **Library and Special JS Features** The benchmark uses no external libraries or special JavaScript features beyond what's built into the standard JavaScript engine. If any advanced features are used, it's not apparent from the provided information. **Other Alternatives** In addition to `slice()` and `pop()`/`shift()`, there might be other ways to remove elements from an array in JavaScript, such as: * Using `splice()` with a start and end index * Creating a new array using `Array.prototype.map()` or `Array.prototype.filter()` * Using array comprehensions (not supported in older browsers) **Benchmark Preparation Code** The provided script preparation code creates an example array `array` containing numbers from 1 to 8, which is used for both benchmarking approaches. Individual test cases: These two individual test cases measure the performance of each approach separately. They essentially repeat the same task but with different methods (`slice()` and `pop()`/`shift()`). **Benchmark Results** The latest benchmark results show that the "Pop and Shift" approach outperforms "Slice" in terms of executions per second, indicating that this sequence may be faster for some browsers or devices.
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