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Math.pow(x,0.5) vs Math.sqrt(x) vs x**0.5
(version: 0)
Comparing performance of:
Math.sqrt vs sqrt with Math.pow vs sqrt with ** .5
Created:
2 years ago
by:
Guest
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Script Preparation code:
var numbers = Array.from(Array(10000), (_,x) => (Math.random()*x));
Tests:
Math.sqrt
numbers.forEach(x => Math.sqrt(x));
sqrt with Math.pow
numbers.forEach(x => Math.pow(x,0.5));
sqrt with ** .5
numbers.forEach(x => x ** 0.5);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Math.sqrt
sqrt with Math.pow
sqrt with ** .5
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 dive into the world of JavaScript microbenchmarks. **Benchmark Definition** The provided JSON defines a benchmark that compares the performance of three different ways to calculate the square root of a number: `Math.pow(x, 0.5)`, `Math.sqrt(x)`, and `x ** 0.5`. The script preparation code generates an array of random numbers with a total length of 10,000. **Options Compared** The benchmark compares three options: 1. **Math.sqrt(x)**: This is the built-in square root function in JavaScript. 2. **Math.pow(x, 0.5)**: This uses the `pow` method to calculate the square root. 3. **x ** 0.5**: This uses the exponentiation operator (`**`) to calculate the square root. **Pros and Cons** Here's a brief summary of each option: * **Math.sqrt(x)**: + Pros: Easy to read, concise, and widely supported. + Cons: May be slower than other methods due to overhead from the built-in function. * **Math.pow(x, 0.5)**: + Pros: Can be faster than `Math.sqrt` for large values due to optimized implementations. + Cons: Less readable, as it explicitly uses exponentiation instead of a dedicated square root function. * **x ** 0.5**: + Pros: Compact and easy to read, with good performance for small to medium-sized numbers. + Cons: May be slower than `Math.pow` or `Math.sqrt` for large values due to the overhead of operator overloading. **Library** None of these options rely on external libraries. **Special JS Feature/Syntax** The test cases use the exponentiation operator (`**`) in a non-standard way, which is not widely supported. However, it's a valid syntax in modern JavaScript and has good performance for small numbers. **Other Alternatives** If you're interested in exploring other options, here are some alternatives: * For large values: `Math.sqrt(x)` is often the best choice due to optimized implementations. * For compact code: `x ** 0.5` or `Math.pow(x, 0.5)` can be good alternatives for small numbers. * For numerical stability: Use `Math.sqrt(x)` or `Math.pow(x, 0.5)` instead of `x ** 0.5` to avoid potential issues with floating-point arithmetic. In summary, the benchmark provides a useful comparison between three options for calculating square roots in JavaScript. While each option has its pros and cons, `Math.sqrt(x)` is often the best choice due to optimized implementations.
Related benchmarks:
Math.pow(x,0.5) vs Math.sqrt(x)
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(x ** 0.5) vs Math.sqrt(x)
Math.pow(x,0.5) vs Math.sqrt(x) 2
x ** 0.5 vs Math.sqrt(x)
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