Benchmark: x*x vs x**2 - MeasureThat.net

Script Preparation code:

a = Math.random()
trash = () => {}

Tests:

x*x
trash(a*a)
x**2
trash(a**2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
x*x
x**2

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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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 MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Definition**
The benchmark definition represents two mathematical expressions: `x*x` and `x**2`. Both expressions are equal, but they use different syntax to represent multiplication. In JavaScript, the `*` operator is commonly used for multiplication, while the `**` operator is a more recent addition (introduced in ECMAScript 2016) that allows for binary exponentiation.

The purpose of this benchmark is to compare the performance of these two expressions in a JavaScript engine.

**Options Compared**
Two options are being compared:

1. **x*x**: Uses the traditional `*` operator for multiplication.
2. **x**2: Uses the `**` operator for exponentiation, which can be faster than traditional multiplication for large values of x.

The idea behind this comparison is to determine whether using the `**` operator provides a performance advantage over traditional multiplication in JavaScript engines.

**Pros and Cons**

* Using the `**` operator has several potential advantages:
	+ Faster execution time for large values of x, since it can take advantage of the CPU's exponentiation instructions.
	+ Reduced overhead compared to traditional multiplication, which may involve more memory accesses or other operations.
* However, using the `**` operator also has some potential drawbacks:
	+ Less intuitive syntax for many developers, which could lead to errors or confusion in code that uses this operator.
	+ May not be supported by older JavaScript engines or environments.

**Library and Purpose**
The `trash` function is used as a no-op (no operation) function in the benchmark preparation code. Its purpose is simply to generate some random value for `a` using `Math.random()`. This allows the benchmark to focus solely on the performance difference between the two expressions, without any additional computational overhead.

**Special JS Feature or Syntax**
The `**` operator used in the benchmark definition is a special JavaScript feature introduced in ECMAScript 2016. It allows for binary exponentiation and can be faster than traditional multiplication for large values of x.

**Alternatives**
Other alternatives to compare these expressions could include:

* Using a different multiplication operator, such as `Math.pow()` or `BigInt`.
* Compiling the expressions to native machine code using tools like V8's `Nan` API.
* Comparing the performance of different JavaScript engines or environments, such as Chrome vs. Firefox vs. Safari.

However, these alternatives would likely require significant changes to the benchmark setup and testing framework.

Related benchmarks:

x*x vs x**2 (version: 0)

Comparing performance of: x*x vs x**2

Created: 7 years ago by: Guest

Jump to the latest result

x*x

x**2

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):