Writing FizzBuzz

Question

Reading the coding horror, I just came across the FizzBuzz another time.

The original post is here: Coding Horror: Why Can\'t Programmers.. Program?

For thos

Answer 1

Obviously this is a bit outside the spirit of the FizzBuzz challenge. But in my benchmark this was the fastest I could make it while single threaded and still terminating at 100. It is semi-unrolled and uses a StringBuilder. It is approximately three times faster than the standard approach.

const string FIZZ = " Fizz\n";
const string BUZZ = " Buzz\n";
const string FIZZBUZZ = " FizzBuzz\n";
    ...
var sb = new StringBuilder();
int i = 0;

while(true)
{       
    sb.Append(i+3);
    sb.Append(FIZZ);        
    sb.Append(i+5);
    sb.Append(BUZZ);        
    sb.Append(i+6);
    sb.Append(FIZZ);        
    sb.Append(i+9);
    sb.Append(FIZZ);        
    sb.Append(i+10);
    sb.Append(BUZZ);        
    if(i+12 > 100)
        break;
    sb.Append(i+12);
    sb.Append(FIZZ);    
    i+=15;
    sb.Append(i);
    sb.Append(FIZZBUZZ);
}

Console.Write(sb.ToString());