Benchmark: ceil vs code bis

Script Preparation code:

var x = Math.random() * 100000000;
var y = Math.random() * 1000000;
var z;

Tests:

ceil
z = Math.ceil(x/y);
code
z = ((x/y) | 0) + ((x % y) != 0)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ceil
code

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/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Windows

View result in a separate tab

Test name	Executions per second
ceil	1755293.1 Ops/sec
code	2280137.5 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in this benchmark and the pros and cons of different approaches.

**Benchmark Definition**

The benchmark definition is a simple JavaScript expression that calculates `z` based on two input values, `x` and `y`. The expression uses two different methods:

1. `Math.ceil(x/y)`: This method rounds up to the nearest integer.
2. `(x/y) | 0 + ((x % y) != 0)`: This method first performs floating-point division, takes the floor of the result using bitwise OR with 0, and then checks if there's a remainder by performing modulo operation on `x` and `y`. If there is a remainder, it adds 1 to the result.

**Options Compared**

The benchmark compares two different approaches:

1. **Rounding up with `Math.ceil`**: This method uses the built-in `Math.ceil` function to round up to the nearest integer.
2. **Flooring using bitwise OR and modulo**: This method uses a combination of bitwise operations and conditional expression to achieve similar rounding behavior.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **Rounding up with `Math.ceil`**
	* Pros:
		+ Concise and readable code
		+ Well-documented and widely supported
	* Cons:
		+ May be slower due to function call overhead
		+ Not suitable for edge cases where `x` is negative or 0
2. **Flooring using bitwise OR and modulo**
	* Pros:
		+ Optimized for performance, avoiding unnecessary divisions and function calls
		+ Can handle edge cases like negative `x`
	* Cons:
		+ Less readable due to use of bitwise operations and conditional expressions
		+ May require additional setup or testing to ensure correct behavior

**Library and Syntax**

There is no specific library being used in this benchmark, but it does rely on standard JavaScript features like bitwise OR (`|`) and modulo (`%`).

**Special JS Feature/ Syntax**

There are no special JS features or syntax mentioned in the benchmark definition.

**Other Alternatives**

If you were to rewrite this benchmark with alternative approaches, some options might include:

* Using a library like `fast-mathjs` for optimized mathematical operations
* Implementing a custom rounding algorithm using bitwise shifts and masks
* Using a just-in-time (JIT) compiler or ahead-of-time (AOT) compilation to optimize performance

Keep in mind that the choice of approach ultimately depends on the specific requirements and constraints of your project.

Related benchmarks:

ceil vs code bis (version: 0)

Comparing performance of: ceil vs code

Created: 4 years ago by: Guest

Jump to the latest result

ceil

code

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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