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hacked if test vs plain if test
(version: 0)
just for fun
Comparing performance of:
plain if vs hacked if
Created:
7 years ago
by:
Registered User
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Script Preparation code:
function sel1(name) { var l = name.length; var ch = name[0]; if (l==3) { if (ch === 'o') { if (name === 'one') return 1; } if (ch === 't') { if (name === 'two') return 2; if (name === 'ten') return 10; } if (ch === 's') { if (name === 'six') return 6; } } if (l==4) { if (ch === 'f') { if (name === 'four') return 4; if (name === 'five') return 5; } if (ch === 'n') { if (name === 'nine') return 9; } } if (l==5) { if (ch === 't') { if (name === 'three') return 3; } if (ch === 's') { if (name === 'seven') return 7; } if (ch === 'e') { if (name === 'eight') return 8; } } } function sel2(name) { if (name === 'one') return 1; if (name === 'two') return 2; if (name === 'ten') return 10; if (name === 'six') return 6; if (name === 'four') return 4; if (name === 'five') return 5; if (name === 'nine') return 9; if (name === 'three') return 3; if (name === 'seven') return 7; if (name === 'eight') return 8; }
Tests:
plain if
sel2('one') sel2('two') sel2('three') sel2('four') sel2('five') sel2('six') sel2('seven') sel2('eight') sel2('nine') sel2('ten')
hacked if
sel1('one') sel1('two') sel1('three') sel1('four') sel1('five') sel1('six') sel1('seven') sel1('eight') sel1('nine') sel1('ten')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
plain if
hacked if
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 JSON and explain what's being tested, compared, and the pros and cons of each approach. **Benchmark Definition** The benchmark definition is a set of JavaScript functions that test the performance of two different approaches to conditional statements. The functions `sel1` and `sel2` are similar, but with some key differences: * `sel1` uses an if-else statement inside the function, while `sel2` uses a series of if-else statements at the top level. * `sel1` checks the length of the input string `name` and then applies different logic based on the first character. If the length is 3 or more, it further checks specific conditions related to the last two characters of the string. * `sel2`, on the other hand, has all the conditional checks at the top level, without checking the length of the input string. **Comparison** The benchmark compares the performance of these two approaches: 1. **Plain if (sel2)**: This approach uses a simple if-else statement structure, which is often considered more readable and maintainable. * Pros: + Easier to understand and debug + Less chance of logical errors due to nesting * Cons: + May be slower due to the overhead of function calls and branch prediction 2. **Hacked if (sel1)**: This approach uses an if-else statement inside the function, which can make it harder to read and maintain. * Pros: + Can be faster due to reduced function call overhead and better branch prediction * Cons: + More prone to logical errors due to nesting + May be less readable for others **Other Considerations** It's worth noting that the benchmark also considers the HTML preparation code, which is null in this case. This suggests that the focus of the benchmark is on the JavaScript functions themselves. Additionally, the benchmark uses a specific version of Firefox (63.0) and Ubuntu as the test environment. This limits the scope of the results to these specific browsers and platforms. **Alternatives** If you were to modify or extend this benchmark, you might consider adding other factors to compare, such as: * Using different programming languages or paradigms * Incorporating more complex logic or algorithms * Adding additional input cases or edge scenarios * Testing the performance of compiled vs. interpreted JavaScript However, keep in mind that modifying a benchmark can introduce new variables and complexities that may affect its accuracy and reliability. Overall, this benchmark provides a simple yet informative comparison between two different approaches to conditional statements in JavaScript, highlighting the trade-offs between readability, maintainability, and performance.
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