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Math.pow(x,0.5) vs Math.sqrt(x) vs (x ** 0.5) reduce sum
(version: 0)
Comparing performance of:
Math.sqrt vs sqrt with Math.pow vs sqrt with ** 0.5
Created:
2 years ago
by:
Registered User
Go to the latest result
Script Preparation code:
var numbers = Array.from(Array(10000), (_,x) => (Math.random()*x));
Tests:
Math.sqrt
const sum = numbers.map(number => Math.sqrt(number)).reduce((a, b) => a + b, 0) console.log(sum)
sqrt with Math.pow
const sum = numbers.map(number => Math.pow(number, 0.5)).reduce((a, b) => a + b, 0) console.log(sum)
sqrt with ** 0.5
const sum = numbers.map(number => number ** 0.5).reduce((a, b) => a + b, 0) console.log(sum)
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 ** 0.5
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0
Browser/OS:
Firefox 128 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=608029" width="100%" height="500px"></iframe>
sqrt with ** 0.5
9K/s
Math.sqrt
7K/s
sqrt with Math.pow
7K/s
View exact numbers
Test name
Executions per second
✓
sqrt with ** 0.5
8,959 Ops/sec
Math.sqrt
7,274 Ops/sec
sqrt with Math.pow
7,069 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** MeasureThat.net is testing the performance of three different methods to calculate the square root of a number in JavaScript: `Math.sqrt`, `Math.pow(x, 0.5)`, and `(x ** 0.5)`. The test cases are comparing the execution time of these methods on an array of random numbers. **Options compared** The three options being compared are: 1. `Math.sqrt`: a built-in JavaScript method to calculate the square root of a number. 2. `Math.pow(x, 0.5)`: a method that uses the power operator (`**`) to raise the input number `x` to the power of 0.5. 3. `(x ** 0.5)`: an alternative syntax that achieves the same result as `Math.pow(x, 0.5)`. **Pros and cons of each approach** 1. `Math.sqrt`: * Pros: concise, readable, and widely supported. * Cons: may be less efficient than other methods due to its implementation in the JavaScript engine. 2. `Math.pow(x, 0.5)`: * Pros: can be more efficient than `Math.sqrt` for some cases, as it avoids the overhead of a function call. * Cons: requires explicit exponentiation, which can make the code less readable. 3. `(x ** 0.5)`: * Pros: concise and expressive, as it directly conveys the intention to calculate the square root. * Cons: may not be supported by older JavaScript engines or browsers. **Library usage** None of the test cases explicitly use any libraries beyond the standard JavaScript library. **Special JS feature or syntax** There are no special features or syntaxes used in these test cases. The code is straightforward and uses only basic JavaScript operators and functions. **Other alternatives** If you wanted to explore alternative methods for calculating square roots, some options might include: 1. Using a library like `sqrt` from the `mathjs` library, which provides an optimized implementation of the square root function. 2. Implementing your own square root algorithm using numerical methods, such as Newton's method or the Babylonian method. 3. Using a different mathematical function, such as the `acosh` function from the `mathjs` library, which calculates the inverse hyperbolic cosine (equivalent to the square root of x + 1). Keep in mind that these alternatives may have different performance characteristics and trade-offs, depending on the specific use case and requirements.
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