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Sqrt vs Pow
(version: 0)
Comparing performance of:
Pow vs Sqrt
Created:
6 years ago
by:
Guest
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Tests:
Pow
Math.pow(1234, 0.5);
Sqrt
Math.sqrt(1234);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Pow
Sqrt
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll dive into explaining the benchmark and its various aspects. **What is tested on MeasureThat.net?** MeasureThat.net tests the performance of different JavaScript functions, specifically the `Math.pow` and `Math.sqrt` functions. These functions are part of the built-in JavaScript Math library. **Options compared:** In this benchmark, two options are being compared: 1. **Using `Math.pow` with a fractional exponent**: The test case `Pow` uses `Math.pow(1234, 0.5)`, which calculates the square root of 1234 using the power operator (`^`) instead of the built-in `sqrt` function. 2. **Using `Math.sqrt` directly**: The test case `Sqrt` uses the `Math.sqrt(1234)` function to calculate the square root of 1234. **Pros and Cons:** 1. **Using `Math.pow` with a fractional exponent**: * Pros: + Can be more efficient in some cases, as it allows for better optimization by the JavaScript engine. + Can be used for arbitrary base calculations, not just square roots. * Cons: + Less readable and maintainable, as it's less intuitive to see a fractional exponent. + May lead to performance variations depending on the specific implementation of `Math.pow`. 2. **Using `Math.sqrt` directly**: * Pros: + More readable and maintainable, as it's more explicit about what operation is being performed. * Cons: + May be slower in some cases due to the overhead of calling a built-in function. **Library:** There is no external library used in this benchmark. The tests are purely JavaScript functions from the built-in Math library. **Special JS feature or syntax:** No special features or syntax are mentioned in the benchmark definition or test cases. However, it's worth noting that some modern browsers may use additional optimization techniques or polyfills for certain features, which could affect performance. **Other alternatives:** If you want to compare other alternatives, here are a few options: 1. **Using `Math.exp` and then squaring**: Instead of using `Math.pow`, you could use `Math.exp` and square the result manually (`Math.sqrt(Math.exp(x))`). This approach would avoid the overhead of the power operator but might lead to slightly worse performance. 2. **Implementing a custom square root function**: You could write your own custom function to calculate the square root, using iterative or recursive methods (e.g., Babylonian method). This approach would provide complete control over optimization and implementation details. Keep in mind that these alternatives are not necessarily better or worse than the original benchmark; they simply offer different approaches to achieve similar results.
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