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testing
(version: 0)
test
Comparing performance of:
1st vs 2nd
Created:
8 years ago
by:
Guest
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Tests:
1st
var i = "HDMU987481" var a = 0; var x = i.charCodeAt(0)-55; var y = i.charCodeAt(1)-55; var z = i.charCodeAt(2)-55; var w = i.charCodeAt(3)-55; a+=Math.floor(x>>3.35)+x; a+=(Math.floor(y>>3.35)+y)<<1; a+=(Math.floor(z>>3.35)+z)<<2; a+=(Math.floor(w>>3.35)+w)<<3; a+=(i.charCodeAt(4)-48)<<4; a+=(i.charCodeAt(5)-48)<<5; a+=(i.charCodeAt(6)-48)<<6; a+=(i.charCodeAt(7)-48)<<7; a+=(i.charCodeAt(8)-48)<<8; a+=(i.charCodeAt(9)-48)<<9; var b = a % 11 % 10; return b
2nd
var i = "HDMU987481" var a = 0; var x = i.charCodeAt(0)-55; var y = i.charCodeAt(1)-55; var z = i.charCodeAt(2)-55; var w = i.charCodeAt(3)-55; a+=Math.floor(x>>3.35)+x; a+=(Math.floor(y>>3.35)+y)*2; a+=(Math.floor(z>>3.35)+z)*4; a+=(Math.floor(w>>3.35)+w)*8; a+=i.charCodeAt(4)*16-768; a+=i.charCodeAt(5)*32-1536; a+=i.charCodeAt(6)*64-3072; a+=i.charCodeAt(7)*128-6144; a+=i.charCodeAt(8)*256-12288; a+=i.charCodeAt(9)*512-24576; var b = a % 11 % 10; return b
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Suite status:
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Test case name
Result
1st
2nd
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a JavaScript microbenchmark, where two test cases are defined to measure the performance of a specific code snippet. The benchmark is designed to test the execution speed of the code on different browsers and devices. **What is being tested?** The code snippet in each test case involves calculating a value `a` based on various operations performed on character codes extracted from a string "HDMU987481". The calculation involves shifting, adding, and multiplying values using bitwise operators (`>>`, `+`, `*`). **Options compared:** In the two test cases, the only difference is in the multiplier used for the multiplication operation. In the first test case ("1st"), a fixed value of 2 is multiplied with `y`, while in the second test case ("2nd"), the same value of 2 is multiplied with `z`. Additionally, the order of operations and the use of bitwise shift operators are different between the two cases. **Pros and Cons of each approach:** 1. **Test Case "1st"** * Pros: + Simpler calculation + Easier to understand and debug * Cons: + May not accurately represent real-world scenarios where `y` is used in similar calculations 2. **Test Case "2nd"** * Pros: + More representative of real-world scenarios where different variables are used * Cons: + More complex calculation, potentially leading to more opportunities for errors **Library usage:** There is no explicit library mentioned in the provided code snippets. However, the use of `charCodeAt` method and bitwise operators suggests that JavaScript's built-in string manipulation functions and bitwise arithmetic capabilities are being utilized. **Special JS feature or syntax:** The provided code snippet uses a bit-shifting operation (`>>`) to shift the bits of an integer value. This is a basic operation in JavaScript, but it may not be immediately obvious for developers without prior experience with bitwise operations. **Other alternatives:** If the goal is to measure the performance of similar calculations on other browsers or devices, additional test cases could be created using different multipliers, variables, and operations. Additionally, testing on various platforms (e.g., macOS, Linux) and browsers (e.g., Chrome, Safari) would provide a more comprehensive understanding of the benchmark's results. To further improve the benchmark, consider adding additional test cases that cover different scenarios, such as: * Using different strings or character sets * Incorporating timing-related functions (e.g., `Date.now()`) * Testing with varying input sizes or complexity * Utilizing other JavaScript features or libraries to create more complex calculations
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