Benchmark: Math.pow vs ** vs * – non-constant

Tests:

pow
let v = 10 * Math.random(); let tmp = Math.pow(v, 21); console.log(tmp);
**
let v = 10 * Math.random(); let tmp = v ** 21; console.log(tmp);
*
let v = 10 * Math.random(); let tmp = v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v * v; console.log(tmp);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
pow
**
*

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and explain what's being tested.

The test case uses JavaScript, specifically the `Math.pow()`, `**` (exponentiation), and `*` (multiplication) operators. These three operators are used to raise a number to a power.

Here's a brief explanation of each operator:

* `Math.pow()` takes two arguments: the base number and the exponent. It returns the result of raising the base number to the power of the exponent.
* `**` is a new syntax introduced in ECMAScript 2016 (also known as "exponentiation operator"). It's similar to `Math.pow()`, but it's shorter and more readable.
* `*` is the multiplication operator, which is used to multiply two or more numbers together.

The benchmark compares the performance of these three operators on a single variable `v`, which is generated randomly between 0 and 10. The variable `tmp` is then calculated by raising `v` to the power of some constant value (in this case, 21).

Now, let's discuss the pros and cons of each approach:

* `Math.pow()`: This method is more explicit and well-defined, but it may incur additional overhead due to the function call. In contrast to `**`, it doesn't rely on a special operator syntax.
* `**` (exponentiation operator): This method is shorter and more readable than `Math.pow()`, but its syntax might be unfamiliar to some developers. However, it's widely supported in modern browsers and ECMAScript engines.
* `*`: Using multiplication multiple times is the most straightforward approach, but it can lead to poor code readability if not used carefully.

Other considerations:

* The benchmark uses a random value for `v` to generate varying inputs. This helps to mitigate any biases in the results due to specific input values.
* The exponent value (21) is chosen arbitrarily, which might affect the outcome of the benchmark. A different exponent could change the relative performance of each operator.

As for libraries or special JavaScript features, there are no notable mentions in this benchmark.

Alternatives to these approaches include using `Math.exp()` and `Math.log()` with some manipulation to achieve exponentiation. However, these methods may introduce additional complexity and overhead compared to the direct use of `**` or `Math.pow()`.

Related benchmarks:

Math.pow vs ** vs * – non-constant (version: 0)

Comparing performance of: pow vs ** vs *

Created: 3 years ago by: Guest

Jump to the latest result

pow

**

*

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):