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(x ** 0.5) vs Math.sqrt(x)
(version: 0)
Comparing performance of:
Math.sqrt 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 ** 0.5
numbers.forEach(x =>x ** 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
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:136.0) Gecko/20100101 Firefox/136.0
Browser/OS:
Firefox 136 on Windows
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<iframe src="https://measurethat.net/Embed?id=596543" width="100%" height="500px"></iframe>
sqrt with ** 0.5
14K/s
Math.sqrt
7K/s
View exact numbers
Test name
Executions per second
✓
sqrt with ** 0.5
14,270 Ops/sec
Math.sqrt
7,311 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark and its components to explain what's being tested, compared, and their pros and cons. **Benchmark Definition** The provided JSON defines a benchmarking scenario with two test cases: 1. `(x ** 0.5) vs Math.sqrt(x)` 2. `numbers.forEach(x => Math.sqrt(x));` 3. `numbers.forEach(x => x ** 0.5);` **What's being tested?** These tests compare the performance of two approaches to calculate the square root of a number: 1. Using the exponentiation operator (`**`) with a fractional power (`0.5`). 2. Using the built-in `Math.sqrt()` function. **Options compared** The test cases compare these two approaches, which have different pros and cons: * **Exponentiation operator (`**`) with a fractional power (`0.5`):** + Pros: - Can be faster for certain use cases (e.g., when working with large numbers). - Often used in mathematical computations. + Cons: - May not be as accurate or reliable as `Math.sqrt()` for all inputs (e.g., very small or very large numbers). * **Built-in `Math.sqrt()` function:** + Pros: - More accurate and reliable than the exponentiation operator approach. - Less prone to numerical instability issues. + Cons: - May be slower due to the overhead of a built-in function. **Library usage** In both test cases, the `numbers` array is created using the `Array.from()` method with a callback function. This is not specific to any particular library; it's a standard JavaScript feature for creating arrays programmatically. **Special JS features or syntax** There are no special JavaScript features or syntaxes mentioned in this benchmarking scenario. It only uses standard JavaScript constructs and built-in functions (e.g., `Math.sqrt()`). **Other alternatives** For alternative approaches to calculate the square root, one might consider using: * **Binary search**: a method that can be used to approximate the square root of a number. * **Newton's method**: an iterative algorithm for approximating the square root of a number. However, these alternatives are not explicitly mentioned in this benchmarking scenario and may have different performance characteristics compared to the built-in `Math.sqrt()` function or the exponentiation operator approach. **Benchmark preparation code** The script preparation code creates an array of 10,000 random numbers between 0 and 10000 using the `Array.from()` method with a callback function: ```javascript var numbers = Array.from(Array(10000), (_,x) => (Math.random()*x)); ``` This is not specific to any particular library; it's a standard JavaScript feature for creating arrays programmatically. **Individual test cases** The two test cases compare the performance of different approaches: 1. `numbers.forEach(x => Math.sqrt(x));`: uses the built-in `Math.sqrt()` function. 2. `numbers.forEach(x => x ** 0.5);`: uses the exponentiation operator (`**`) with a fractional power (`0.5`). These test cases are likely used to determine which approach is faster and more efficient for calculating square roots in JavaScript.
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