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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 ** 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
numbers.forEach(x => Math.sqrt(x));
sqrt with Math.pow
numbers.forEach(x => Math.pow(x,0.5));
sqrt with ** 0.5
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 ** 0.5
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser/OS:
Chrome 124 on Mac OS X 10.15.7
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=521773" width="100%" height="500px"></iframe>
sqrt with ** 0.5
157K/s
sqrt with Math.pow
2K/s
Math.sqrt
2K/s
View exact numbers
Test name
Executions per second
✓
sqrt with ** 0.5
157,102 Ops/sec
sqrt with Math.pow
1,668 Ops/sec
Math.sqrt
1,611 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** The provided JSON represents a JavaScript microbenchmark created using the MeasureThat.net platform. The benchmark is designed to compare 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)`. **Options Compared** The benchmark compares the following options: 1. `Math.pow(x, 0.5)`: This method uses the exponentiation operator (`**`) to calculate the square root of a number. 2. `Math.sqrt(x)`: This method is a built-in function provided by JavaScript's Math library, which calculates the square root of a number. 3. `(x ** 0.5)`: This is an alternative syntax for calculating the square root of a number using exponentiation. **Pros and Cons** Here are some pros and cons of each approach: 1. `Math.pow(x, 0.5)`: * Pros: Simple to implement, no special library required. * Cons: May be slower than native Math functions due to overhead from exponentiation operator usage. 2. `Math.sqrt(x)`: * Pros: Fastest and most efficient method, provided by JavaScript's built-in Math library. * Cons: Requires access to the Math library, which may not always be available or enabled in all environments. 3. `(x ** 0.5)`: * Pros: Similar performance to `Math.sqrt(x)`, but without relying on the Math library. * Cons: May require special syntax handling, and can lead to confusing code if not used carefully. **Library Usage** None of the benchmarked methods explicitly use a JavaScript library beyond the built-in Math library. However, it's worth noting that some JavaScript engines may optimize or provide custom implementations for certain mathematical functions, which could affect performance. **Special JS Features/Syntax** The `(x ** 0.5)` syntax is an example of a special JavaScript feature: exponentiation operator (`**`). This operator was introduced in ECMAScript 2016 and allows for concise and expressive way to calculate powers and roots. **Other Alternatives** If you need to implement square root calculation without relying on built-in functions or custom libraries, some alternatives include: * Using the Babylonian method or other iterative algorithms to approximate the square root. * Implementing a polynomial approximation of the square root function, such as using a Taylor series expansion. However, these approaches typically require more code and mathematical expertise than simply using `Math.sqrt(x)` or `(x ** 0.5)`.
Related benchmarks
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(x ** 0.5) vs Math.sqrt(x)
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x ** 0.5 vs Math.sqrt(x)
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