Benchmark: Math.pow vs x*=x vs x=x*x

Script Preparation code:

var x=5;

Tests:

Math.pow
x=Math.pow(x,2);
x=x*x
x=x*x;
x*=x
x*=x;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Math.pow
x=x*x
x*=x

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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0

Browser/OS: Chrome 134 on Windows

View result in a separate tab

Test name	Executions per second
Math.pow	13412376.0 Ops/sec
x=x*x	12983309.0 Ops/sec
x*=x	13188515.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of measuring JavaScript performance.

**Benchmark Definition**

The benchmark definition represents the core logic of each test case. In this case, we have three tests:

1. `x=Math.pow(x,2);` - This line uses the built-in `Math.pow()` function to calculate the square of `x`.
2. `x=x*x;` - This line uses a simple multiplication assignment to achieve the same result as the previous one.
3. `x*=x;` - This line uses the unary multiplication operator (`*=`) to multiply `x` by itself.

These tests are designed to measure the performance of each approach on different JavaScript engines and devices.

**Options Compared**

The three options being compared are:

1. **Built-in `Math.pow()` function**: This is a standard library function that calculates the power of a number.
2. **Simple multiplication assignment (`x=x*x;`)**: This method uses a simple multiplication operation to calculate the square of `x`.
3. **Unary multiplication operator (`x*=x;`)**: This method uses a single assignment to multiply `x` by itself.

**Pros and Cons**

1. **Built-in `Math.pow()` function**:
	* Pros: Fast, reliable, and well-optimized.
	* Cons: May not be available in all JavaScript engines or browsers.
2. **Simple multiplication assignment (`x=x*x;`)**:
	* Pros: Simple to implement, no external dependencies required.
	* Cons: May be slower due to repeated operations.
3. **Unary multiplication operator (`x*=x;`)**:
	* Pros: Simple and concise syntax, can be faster in some cases.
	* Cons: May not work as expected in all JavaScript engines or browsers.

**Other Considerations**

When choosing between these options, consider the following:

* Performance-critical code: For high-performance applications, using the built-in `Math.pow()` function is generally a good choice.
* Code readability and maintainability: Simple multiplication assignment can be easier to understand for some developers, while others may prefer the more concise syntax of unary multiplication operator.
* Browser support: If you need to ensure compatibility across different browsers or JavaScript engines, using the built-in `Math.pow()` function or simple multiplication assignment might be a better option.

**Libraries and Special Features**

There are no external libraries used in this benchmark. However, it's worth noting that some JavaScript engines may have specific optimizations or features that can affect performance.

**Special JS Feature/Syntax**

This benchmark does not use any special JavaScript feature or syntax. The focus is on measuring the performance of simple arithmetic operations using different approaches.

If you're interested in exploring more advanced topics, such as parallel processing or Just-In-Time (JIT) compilation, there are other benchmarks and resources available that can help.

Related benchmarks:

Math.pow vs x=x vs x=xx (version: 0)

Comparing performance of: Math.pow vs x=xx vs x=x

Created: 4 years ago by: Guest

Jump to the latest result

Math.pow

x=x*x

x*=x

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Math.pow vs x*=x vs x=x*x (version: 0)

Comparing performance of: Math.pow vs x=x*x vs x*=x

Created: 4 years ago by: Guest

Jump to the latest result

Math.pow

x=x*x

x*=x

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Math.pow vs x=x vs x=xx (version: 0)

Comparing performance of: Math.pow vs x=xx vs x=x