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Math.pow(x,0.5) vs Math.sqrt(x) vs ** 0.5
(version: 0)
Comparing performance of:
Math.sqrt vs sqrt with Math.pow vs sqrt with ** 0.5
Created:
2 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
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.0
Browser/OS:
Chrome 124 on Windows
View result in a separate tab
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=522850" width="100%" height="500px"></iframe>
sqrt with ** 0.5
122K/s
sqrt with Math.pow
2K/s
Math.sqrt
1K/s
View exact numbers
Test name
Executions per second
✓
sqrt with ** 0.5
122,012 Ops/sec
sqrt with Math.pow
1,515 Ops/sec
Math.sqrt
1,479 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
The provided JSON represents a JavaScript benchmarking test on the MeasureThat.net website. The purpose of this benchmark is to compare the performance of three different methods for calculating the square root of a number: `Math.pow(x, 0.5)`, `Math.sqrt(x)`, and `x ** 0.5`. **Option Comparison** The three options are compared in the following ways: 1. **Method**: Each option uses a different method to calculate the square root. 2. **Library Usage**: Only the first option (`numbers.forEach(x => Math.sqrt(x))`) uses a library function, which is part of the JavaScript standard library (`Math.sqrt`). 3. **Syntax**: Two options use a syntax with the exponentiation operator (`**`), while one option uses the `Math.pow()` function. **Pros and Cons** Here are some pros and cons for each option: 1. **Method: Math.sqrt(x)** * Pros: Native JavaScript function, fast execution. * Cons: Requires a library function call, which may incur overhead. 2. **Method: x ** 0.5** * Pros: Simple syntax, native JavaScript operator. * Cons: May be slower than `Math.pow()` or `Math.sqrt()`, as it uses exponentiation instead of division. 3. **Method: Math.pow(x, 0.5)** * Pros: Fast execution, can be optimized by browsers. * Cons: Uses a library function call (`Math.pow()`), which may incur overhead. **Other Considerations** 1. **Library Usage**: The use of `Math.sqrt` as a library function may affect the overall performance of the benchmark. However, in modern JavaScript engines, this should not have significant impact. 2. **Syntax and Readability**: The syntax used for each option affects readability and maintainability of the code. **Alternative Options** If you want to explore alternative options, here are a few ideas: 1. Use a third-party library like `fast-expm` or `exponentiation` to calculate the square root. 2. Implement a custom square root algorithm using bitwise operations. 3. Compare the performance of different programming languages (e.g., Python, C++) for calculating square roots. Keep in mind that these alternatives may not be relevant to your specific use case and might introduce additional complexity.
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