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 without abs with pow
var a = Math.random()*100; var b = Math.random()*100; var x = (Math.sqrt(Math.pow(a-b,2))-Math.sqrt(Math.pow(a-b+1,2))+1)/2; var y = 0.7 * x;
Compare without abs or pow
var a = Math.random()*100; var b = Math.random()*100; var x = (Math.sqrt((a-b)*(a-b))-Math.sqrt((a-b+1)*(a-b+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 without abs with pow
Compare without abs or pow

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 what's being tested on MeasureThat.net.

**Benchmark Purpose**

The goal of these benchmarks is to compare the performance of different approaches for assigning values to variables `x` in JavaScript expressions, given that `a` and `b` are randomly generated. The tests aim to measure which approach is fastest.

**Options Compared**

Four alternatives are being tested:

1. **If-else statement**: This approach checks whether `b` is greater than `a`, and if so, assigns a value of 1 to `x`.
2. **Simple assignment with x = 0 or x = 1**: In this case, the value of `x` is directly set to either 0 or 1.
3. **Math.abs function without absolute difference calculation**: This approach uses the `Math.abs()` function to calculate an expression that does not depend on the difference between `a` and `b`.
4. **Square root calculations**: Similar to the previous point, but instead of using `Math.abs()`, it calculates square roots of expressions involving `a` and `b`.

**Pros and Cons**

Here's a brief overview of each approach:

* If-else statement:
	+ Pros: Simple and easy to understand.
	+ Cons: Can be slower due to the condition evaluation and branching.
* Simple assignment with x = 0 or x = 1:
	+ Pros: Fast and straightforward, with no branch prediction errors.
	+ Cons: Assumes that `b > a` is always true, which might not hold in all cases.
* Math.abs function without absolute difference calculation:
	+ Pros: Does not rely on the specific values of `a` and `b`.
	+ Cons: May be slower due to the additional calculations.
* Square root calculations:
	+ Pros: Can provide a more interesting benchmark for CPU performance.
	+ Cons: Requires more computations, which might slow down the test.

**Library Usage**

None of these benchmarks use external libraries. They rely solely on JavaScript core functions and built-in types.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax used in these benchmarks. The tests focus on basic arithmetic operations and control flow statements (if-else).

Now, let's discuss alternatives to MeasureThat.net:

* Other online benchmarking platforms, such as jsPerf or Benchmark.js, offer similar functionality.
* Node.js itself provides a built-in `Benchmark` module for running performance tests.
* For more comprehensive testing, you can use a testing framework like Jest or Mocha, which offer built-in support for benchmarking.

Keep in mind that different platforms and frameworks might have their own specific requirements and recommendations for setting up benchmarks.

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	41364900.0 Ops/sec
Compare if else	41659220.0 Ops/sec
Compare math abs	43788104.0 Ops/sec
Compare without abs with pow	35088160.0 Ops/sec
Compare without abs or pow	39709536.0 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 without abs with pow vs Compare without abs or pow

Created: 7 years ago by: Guest

Jump to the latest result

Compare if, x predefined as 0

Compare if else

Compare math abs

Compare without abs with pow

Compare without abs or pow

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):