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swap test
(version: 0)
Comparing performance of:
2017 swap vs 1824 swap
Created:
8 years ago
by:
Guest
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Tests:
2017 swap
let swap = ([a, b]) => [b, a]; let inArr = [5, 7]; let outArr = swap(inArr);
1824 swap
let inA = 5; let inB = 7; inA ^= inB; inB ^= inA; inA ^= inB;
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
2017 swap
1824 swap
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data for the MeasureThat.net benchmark. **Benchmark Definition** The benchmark is defined as follows: ``` "let swap = ([a, b]) => [b, a];\r\n\r\nlet inArr = [5, 7];\r\nlet outArr = swap(inArr);\r\n" ``` This benchmark defines a simple function named `swap` that takes an array of two elements `[a, b]` and returns the same array with its elements swapped. The test case then creates an array `inArr` with values 5 and 7, and passes it to the `swap` function, storing the result in `outArr`. The second benchmark definition is: ``` "let inA = 5;\r\nlet inB = 7;\r\n\r\ninA ^= inB;\r\ninB ^= inA;\r\ninA ^= inB;\r\n" ``` This benchmark defines a different swap logic using bitwise XOR operator (`^=`) instead of array swapping. **Options Compared** The two benchmarks compare the performance of array swapping methods: 1. **Array swapping** (benchmark 1): Creates a new array with the elements swapped, which involves creating a new array and copying the elements. 2. **Bitwise XOR swap** (benchmark 2): Swaps the values without creating a new array, using bitwise XOR operator (`^=`) to achieve the swap. **Pros and Cons** **Array Swapping:** Pros: * Easy to read and understand * Works well for small arrays Cons: * Creates a new array, which can be memory-intensive * May have performance overhead due to array creation **Bitwise XOR Swap:** Pros: * Does not create a new array, reducing memory allocation * Can be faster since it avoids array creation Cons: * May require additional calculations for larger arrays * Less intuitive and harder to read than array swapping Other considerations: * In the benchmark results, the `ExecutionsPerSecond` value represents the number of times the swap logic is executed per second. This can help in understanding which method performs better under different execution frequencies. **Libraries Used** No libraries are explicitly mentioned in the provided JSON data. **Special JS Features/Syntax** The benchmark uses bitwise XOR operator (`^=`) for swapping values, which is a common pattern in JavaScript. However, it's worth noting that this approach may not be suitable for all use cases, especially when dealing with larger arrays or more complex data structures. **Alternatives** Other alternatives to array swapping and bitwise XOR swap include: 1. **Destructuring assignment**: Can be used to swap values without creating a new array. 2. **Function-based swap**: Similar to the array swapping approach, but using a separate function for swapping. 3. **Pointer swizzling**: A more complex approach that involves manipulating pointers or references to achieve the swap. These alternatives may offer better performance or readability in certain scenarios, but they also introduce additional complexity and potential pitfalls.
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