Benchmark: sqrt vs power to 0.5

Tests:

sqrt
let result = []; for (let i = 0; i<100; i++) { result.push(Math.sqrt(i)); }
power to 0.5
let result = []; for (let i = 0; i<100; i++) { result.push(i ** 0.5); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
sqrt
power to 0.5

Fastest: N/A

Slowest: N/A

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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I'll explain the benchmark in detail.

**Benchmark Purpose and Scope**

The provided JSON represents a JavaScript microbenchmark, which is designed to compare the performance of two different approaches for calculating the square root of a number: `Math.sqrt()` and exponentiation with a fractional exponent (`i ** 0.5`).

The benchmark consists of two test cases:

1. "sqrt": This test case uses the `Math.sqrt()` method to calculate the square root of 100 numbers (from 0 to 99).
2. "power to 0.5": This test case uses exponentiation with a fractional exponent (`i ** 0.5`) to calculate the square root of 100 numbers (from 0 to 99).

**Comparison of Options**

The two approaches have different pros and cons:

1. `Math.sqrt()`:
	* Pros:
		+ More readable and maintainable code.
		+ Fewer potential pitfalls (e.g., overflow errors).
	* Cons:
		+ May be slower due to the overhead of a function call.
2. Exponentiation with fractional exponent (`i ** 0.5`):
	* Pros:
		+ Can be faster, as it eliminates the need for a function call and avoids potential pitfalls like overflow errors.
	* Cons:
		+ Less readable and maintainable code.
		+ May exhibit non-obvious behavior due to the properties of exponentiation.

**Library Usage**

The benchmark uses the `Math` object, which is a built-in JavaScript library that provides mathematical functions for various operations. In this case, the `Math.sqrt()` method is used to calculate square roots.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes mentioned in the benchmark definition or test cases. The code uses standard JavaScript syntax and does not exploit any specific features or plugins.

**Alternative Approaches**

Other approaches that could be compared in a similar benchmark might include:

1. Using the `binary-search` algorithm to find the square root, which can be more efficient than `Math.sqrt()` for very large numbers.
2. Implementing the Babylonian method, an ancient algorithm for computing square roots, which can be faster than `Math.sqrt()` but requires more complex code.
3. Using a library like `numjs` or `fast-estimator`, which provide optimized implementations of mathematical functions, including square root calculations.

Overall, the benchmark provides a useful comparison between two common approaches to calculating square roots in JavaScript, highlighting their pros and cons.

Related benchmarks:

sqrt vs power to 0.5 (version: 0)

Comparing performance of: sqrt vs power to 0.5

Created: 4 years ago by: Guest

Jump to the latest result

sqrt

power to 0.5

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):