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Math.sqrt(x) vs x**0.5
(version: 0)
Comparing performance of:
Math.sqrt(x) vs x**0.5
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var numbers = Array.from(Array(10000), (_,x) => (Math.random()*x));
Tests:
Math.sqrt(x)
numbers.forEach(n => Math.sqrt(n))
x**0.5
numbers.forEach(n => n**0.5)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Math.sqrt(x)
x**0.5
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
8 months ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36
Browser/OS:
Chrome 141 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=621039" width="100%" height="500px"></iframe>
Math.sqrt(x)
324K/s
x**0.5
52K/s
View exact numbers
Test name
Executions per second
✓
Math.sqrt(x)
323,580 Ops/sec
x**0.5
52,386 Ops/sec
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 options, pros and cons, and other considerations. **Benchmark Definition** The benchmark is designed to compare two ways of calculating the square root of a number: `Math.sqrt(x)` (square root using the Math library) vs `x**0.5` (exponentiation with a power of 0.5). **Script Preparation Code** The script preparation code generates an array of 10,000 random numbers between 0 and the current iteration index (`x`). This creates a large dataset for the benchmark to measure performance. **Html Preparation Code** There is no HTML preparation code provided, which means that the test cases are run in a headless environment or don't require any specific HTML setup. **Individual Test Cases** There are two test cases: 1. `Math.sqrt(x)`: This test case measures the performance of using the `Math.sqrt()` function to calculate the square root of each number in the array. 2. `x**0.5`: This test case measures the performance of calculating the square root of each number by raising it to the power of 0.5. **Library: Math** The Math library is used for both test cases, specifically for the `Math.sqrt()` function. The purpose of this library is to provide mathematical functions and operations that can be used in JavaScript applications. **Special JS Feature/Syntax: None** There are no special JavaScript features or syntax used in this benchmark. **Other Alternatives** To measure the performance of these test cases, other alternatives could include: * Using a different programming language (e.g., Python, C++) * Utilizing parallel processing or multi-threading to execute multiple iterations concurrently * Implementing a custom square root algorithm using bitwise operations or polynomial approximations * Using a Just-In-Time (JIT) compiler to optimize the performance of the test cases **Comparison of Options** The two options being compared are: 1. `Math.sqrt(x)`: This method uses a mathematical library function that is widely supported and optimized for performance. 2. `x**0.5`: This method uses exponentiation with a power of 0.5, which can be calculated using a simple multiplication operation. Pros and Cons: * `Math.sqrt(x)`: + Pros: Widely supported, well-optimized, and accurate. + Cons: May have performance overhead due to library function call. * `x**0.5`: + Pros: Fast execution speed, as it only involves a simple multiplication operation. + Cons: May not be as accurate or reliable as the Math library function. In general, for most use cases, using the Math library's `Math.sqrt()` function is recommended due to its accuracy and wide support. However, if performance is critical and the application has specific requirements, implementing a custom square root algorithm or utilizing alternative methods may be necessary.
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