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Test DFS
(version: 0)
Comparing performance of:
unshift + shift vs push reverse + pop
Created:
3 years ago
by:
Guest
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Tests:
unshift + shift
var arr = []; var toAdd = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; while(arr.length < 10000) { arr.unshift(...toAdd); for(var i = 0; i < 2; ++i) arr.shift(); } while(arr.length) arr.shift();
push reverse + pop
var arr = []; var toAdd = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; while(arr.length < 10000) { arr.push(...[...toAdd].reverse()); for(var i = 0; i < 2; ++i) arr.pop(); } while(arr.length) arr.pop();
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Suite status:
<idle, ready to run>
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Test case name
Result
unshift + shift
push reverse + pop
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark data for you. **Benchmark Overview** MeasureThat.net is a website where users can create and run JavaScript microbenchmarks to compare different approaches for a specific task. The provided benchmark test cases are designed to measure the performance of two different methods for adding and removing elements from an array in JavaScript. **Test Cases** There are two test cases: 1. "unshift + shift" * This test case measures the performance of adding elements to the beginning of an array using `arr.unshift(...toAdd)` followed by removing elements from the end of the array using `for(var i = 0; i < 2; ++i) arr.shift();`. 2. "push reverse + pop" * This test case measures the performance of pushing reversed elements to the end of an array using `arr.push(...[...toAdd].reverse())` followed by removing elements from the end of the array using `for(var i = 0; i < 2; ++i) arr.pop();`. **Options Compared** The two test cases compare the performance of different approaches for adding and removing elements from an array. Pros and Cons: 1. "unshift + shift": * Pros: + Simple to implement. + Works well for small arrays. * Cons: + Can be slower for large arrays due to the overhead of creating a new array when using `arr.unshift(...toAdd)`. 2. "push reverse + pop": * Pros: + More efficient for large arrays since it avoids creating a new array. * Cons: + Requires reversing the array before pushing it, which can be slower. **Library and Syntax Considerations** Neither test case uses any external libraries or special JavaScript features. The code is straightforward and focuses on demonstrating the performance differences between two approaches. **Other Alternatives** If you're interested in exploring alternative methods for adding and removing elements from an array, here are a few options: 1. `arr.splice()`: This method can be used to remove elements from an array while preserving the existing elements. 2. `Array.prototype.map()` with `Array.prototype.forEach()`: This approach involves mapping over the array, performing some operation on each element, and then iterating over the resulting array using `forEach()`. 3. Using a more specialized data structure, such as a linked list or a deque. Keep in mind that these alternatives may have different performance characteristics depending on the specific use case and requirements.
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