Benchmark: Compare long way

Tests:

Compare if, x predefined as 0
var a = Math.random()*100; var b = Math.random()*100; var x = 0; if ( b > a ) { var x = 1; }; var y = 0.7 * x;
Compare if else
var a = Math.random()*100; var b = Math.random()*100; if ( b > a ) { var x = 1; } else { var x = 0; }; var y = 0.7 * x;
Compare math abs
var a = Math.random()*100; var b = Math.random()*100; var x = (Math.abs(a-b)-Math.abs(a-b+1)+1)/2; var y = 0.7 * x;
Compare math abs 0p5
var a = Math.random()*100; var b = Math.random()*100; var x = (Math.abs(a-b)-Math.abs(a-b+1)+1)*0.5; var y = 0.7 * x;
Compare math one abs
var a = Math.random()*100; var b = Math.random()*100; var x = ((b-a-1)/Math.abs(b-a-1)+1)/2; var y = 0.7 * x;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Compare if, x predefined as 0
Compare if else
Compare math abs
Compare math abs 0p5
Compare math one abs

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definitions and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare different ways of calculating `x` in two `if-else` conditions, as well as with the use of `Math.abs()` function. The goal is to determine which approach yields the best performance.

**Test Cases**

There are four test cases:

1. **Compare if, x predefined as 0**: This test case uses a simple `if` statement to assign `x = 1` or `x = 0` based on a condition. The value of `x` is then used to calculate `y`.
2. **Compare if else**: Similar to the previous test case, but with an `else` clause.
3. **Compare math abs**: This test case uses the `Math.abs()` function to calculate `x`. There are two variations:
	* `Compare math abs 0p5`: Multiplies the result of `Math.abs()` by 0.5.
	* `Compare math one abs`: Divides the result of `Math.abs()` minus 1 by its absolute value, then adds 1 and divides again by 2.
4. **Compare math one abs**: Another variation of the previous test case.

**Library Usage**

None of the benchmark definitions explicitly use any libraries beyond JavaScript's built-in `Math` object.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in these benchmark definitions, such as async/await, promises, or modern ES6+ features like arrow functions, template literals, or destructuring.

**Performance Considerations**

When evaluating performance, the following factors come into play:

* **Branch prediction**: Modern CPUs often use branch prediction to guess which branch will be taken. If the actual branch is different from the predicted one, it can lead to a slight penalty. In these benchmark definitions, both `if` and `else` branches are used, so we need to consider how well each test case performs with respect to branch prediction.
* **Arithmetic complexity**: Calculating `x` involves simple arithmetic operations like multiplication, division, and addition/subtraction. The order of operations can affect performance due to various factors like CPU pipeline optimization, register allocation, and cache misses.
* **Cache locality**: Modern CPUs have a large cache hierarchy to optimize performance. The test cases with simpler calculations (e.g., `Compare math abs`) are likely to be more cache-friendly than those with more complex calculations (e.g., `Compare if`).

**Other Alternatives**

If you want to explore alternative approaches or modify the benchmark, consider the following options:

* **Use different mathematical operations**: Try using other mathematical functions like exponentiation, logarithms, or trigonometric functions.
* **Add more test cases**: Increase the number of test cases with varying complexities and branching scenarios.
* **Modify the condition**: Change the conditions used in each test case to simulate real-world usage patterns.
* **Use a different programming language**: If you're interested in exploring performance differences between JavaScript and another language, feel free to create new benchmark definitions using that language.

Keep in mind that this is just a starting point for your exploration. You can always modify or extend the existing benchmark definitions to suit your specific needs or interests!

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0

Browser/OS: Firefox 53 on Windows 7

View result in a separate tab

Test name	Executions per second
Compare if, x predefined as 0	41469216.0 Ops/sec
Compare if else	41393424.0 Ops/sec
Compare math abs	43429712.0 Ops/sec
Compare math abs 0p5	43807112.0 Ops/sec
Compare math one abs	50724272.0 Ops/sec

Related benchmarks:

Compare long way (version: 0)

Testing some alternative if comparing

Comparing performance of: Compare if, x predefined as 0 vs Compare if else vs Compare math abs vs Compare math abs 0p5 vs Compare math one abs

Created: 7 years ago by: Guest

Jump to the latest result

Compare if, x predefined as 0

Compare if else

Compare math abs

Compare math abs 0p5

Compare math one abs

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):