Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array pop vs at
(version: 0)
Comparing pop-push method vs last index check for an array element
Comparing performance of:
pop vs at
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr1 = [0,1,2,3,4,5,6,7,8,9]; var arr2 = []; function getLastPop(arr) { return arr.pop(); } function getLastAt(arr) { return arr.at(-1); }
Tests:
pop
getLastPop(arr1); getLastPop(arr1); getLastPop(arr2);
at
getLastAt(arr1); getLastAt(arr1); getLastAt(arr2);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
pop
at
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0
Browser/OS:
Firefox 148 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
Test name
Executions per second
pop
27522936.0 Ops/sec
at
893679168.0 Ops/sec
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 compares two approaches for accessing the last element of an array: 1. `getLastPop` method: This function uses the `pop()` method to remove and return the last element from the array, effectively removing the element from the array. 2. `getLastAt` method: This function uses the `at(-1)` method to access the last element of the array without modifying it. **Options Compared** The two options being compared are: * `getLastPop(arr1)`: Removes and returns the last element from `arr1`. * `getLastPop(arr2)`: Removes and returns the last element from an empty array `arr2`. This is likely done to test the performance of removing an element from a non-empty array. * `getLastAt(arr1)`: Returns the last element of `arr1` without modifying it. * `getLastAt(arr2)`: Returns the last element of `arr2` without modifying it. This is likely done to test the performance of accessing an empty array. **Pros and Cons** * **`getLastPop` method:** + Pros: - Efficient for removing elements from arrays, as it only requires a single operation. + Cons: - May not be suitable when you need to access elements without modifying the array. - Can be slower than `at(-1)` for accessing large arrays. * **`getLastAt` method:** + Pros: - Fast and efficient for accessing elements without modifying the array. - Suitable for most use cases where you need to access an element without removing it. + Cons: - May not be suitable when you need to remove elements from arrays. - Can be slower than `pop()` for removing elements. **Library: `at()` method** The `at(-1)` method is a part of the JavaScript ECMAScript standard, and it allows you to access an element at a specific index without modifying the array. The `-1` index refers to the last element of the array. **Special JS Feature/Syntax** There doesn't seem to be any special or experimental JavaScript features or syntax being tested in this benchmark. Both `at(-1)` and `pop()` methods are standard and widely supported. **Other Alternatives** If you need to access elements from an array without modifying it, other alternatives like using indexing (`arr[arr.length - 1]`) or slicing (`arr.slice(-1)`) might be suitable. However, these approaches may not be as efficient as `at(-1)` for large arrays. For removing elements from arrays, other alternatives like using the `splice()` method or a library like Lodash's `removeAt()` function might be more convenient and efficient.
Related benchmarks:
Array pop-push vs last index element check
Array Slice vs Pop
Array pop vs shift
pop vs index for array
Comments
Confirm delete:
Do you really want to delete benchmark?