Benchmark: left shift vs math.pow vs Exponentiation

Tests:

left shfit
const a = 4 << 15;
Math.pow
const a = 4 * Math.pow(2, 15);
Exponentiation
const a = 4 * (2 ** 15);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
left shfit
Math.pow
Exponentiation

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/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Windows

View result in a separate tab

Test name	Executions per second
left shfit	81235376.0 Ops/sec
Math.pow	5711711.5 Ops/sec
Exponentiation	82280376.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark is designed to compare the performance of three different ways to perform exponentiation in JavaScript:

1. Left shift operation (`<<`)
2. `Math.pow()` function
3. Exponentiation using the `**` operator (also known as "fat arrow" syntax)

**Test Cases and Options Compared**

Each test case measures the execution time for a single exponentiation operation with a base of 4 and an exponent of 15.

* The three options compared are:
	+ Left shift operation (`<<`)
	+ `Math.pow()` function
	+ Exponentiation using the `**` operator

**Pros and Cons of Each Approach**

1. **Left Shift Operation (`<<`)**:
	* Pros: Simple, fast, and often used in embedded systems or low-level programming.
	* Cons: May not be as readable or efficient for complex exponentiations, can lead to integer overflow issues if the result exceeds the maximum value that can be represented by an `int`.
2. **Math.pow() Function**:
	* Pros: Widely supported, well-documented, and easy to use.
	* Cons: Can be slower than native exponentiation operations due to function call overhead.
3. **Exponentiation using the `**` Operator (Fat Arrow Syntax)**:
	* Pros: Fast, modern, and widely supported in modern JavaScript engines.
	* Cons: May not be supported in older browsers or Node.js versions.

**Library Used**

In this benchmark, no library is explicitly mentioned as being used. However, it's worth noting that the `Math.pow()` function relies on the implementation of the `pow` function in the underlying platform's math library.

**Special JS Feature/Syntax**

The `**` operator (exponentiation using fat arrow syntax) is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It provides a concise way to perform exponentiation without the need for the `Math.pow()` function or left shift operation. This feature is enabled by default in most modern browsers and Node.js versions.

**Other Alternatives**

In addition to the three options compared in this benchmark, other alternatives for performing exponentiation in JavaScript include:

* Using a library like `numjs` or `mathjs`, which provide optimized implementations of mathematical functions, including exponentiation.
* Utilizing a Just-In-Time (JIT) compiler like V8 (used by Google Chrome and Node.js) to optimize the execution time of specific workloads.

Keep in mind that these alternatives may not be relevant for this particular benchmark, which focuses on comparing the performance of three specific options.

Related benchmarks:

left shift vs math.pow vs Exponentiation (version: 0)

Comparing performance of: left shfit vs Math.pow vs Exponentiation

Created: 2 years ago by: Guest

Jump to the latest result

left shfit

Math.pow

Exponentiation

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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