Benchmark: Bitwise, Bitwise not, and Math floor

Script Preparation code:

var number = 12.68;

Tests:

Math.floor
Math.floor(number);
Bitwise
number | 0
Bitwise not operator
~~number

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Math.floor
Bitwise
Bitwise not operator

Fastest: N/A

Slowest: N/A

Latest 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 break down the provided benchmark definitions and explain what is being tested, along with their pros and cons.

**Benchmark Definition**
The benchmark definition json contains three test cases:

1. `Math.floor(number);` - This test case checks the performance of the `Math.floor()` function, which returns the largest integer less than or equal to a given number.
2. `number | 0` - This test case uses the bitwise OR operator (`|`) with the value `0`. In JavaScript, this is equivalent to removing all decimal points from a number (a feature known as "bitwise truncation" or "integer truncation").
3. `~~number` - This test case uses the bitwise NOT operator (`~`) on a number. In JavaScript, this converts the number to an integer by performing a two's complement operation.

**Pros and Cons of Different Approaches**

1. **Math.floor()**: This approach is widely supported and well-maintained in modern browsers.
	* Pros: Easy to understand, widely supported, and efficient.
	* Cons: May not be optimized for performance in certain edge cases.
2. **Bitwise (number | 0)**: This approach uses bitwise operations to remove decimal points from a number.
	* Pros: Can be faster than Math.floor() due to the use of bitwise operations.
	* Cons: Less intuitive and may require more CPU cycles, depending on the hardware.
3. **Bitwise not operator (`~~number`)**: This approach converts the number to an integer using the bitwise NOT operator.
	* Pros: Can be faster than Math.floor() due to the use of bitwise operations.
	* Cons: Less intuitive, may not work correctly for negative numbers or NaN (Not a Number), and can result in unexpected behavior.

**Library Usage**
None of the provided benchmark definitions rely on any specific libraries.

**Special JS Features or Syntax**
The `number | 0` test case uses the bitwise OR operator (`|`) with a value, which is a feature specific to JavaScript. The `~~number` test case uses the bitwise NOT operator (`~`) on a number, which is also a JavaScript-specific feature.

**Other Alternatives**

If you were to implement these tests yourself, you could consider using other libraries or frameworks that provide similar functionality, such as:

* For testing `Math.floor()`: You could use the `Number.EPSILON` constant provided by the ECMAScript standard.
* For testing bitwise truncation (`number | 0`): You might need to implement a custom function to remove decimal points from a number.
* For testing the bitwise NOT operator (`~~number`): You would likely need to create your own implementation, as there isn't an official way to do this in JavaScript.

Keep in mind that these alternatives may not be supported by all browsers or platforms, so it's essential to test thoroughly and consider compatibility issues when implementing custom tests.

Related benchmarks:

Bitwise, Bitwise not, and Math floor (version: 0)

Comparing performance of: Math.floor vs Bitwise vs Bitwise not operator

Created: 4 years ago by: Guest

Jump to the latest result

Math.floor

Bitwise

Bitwise not operator

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):