70 lines
1.3 KiB
C#
70 lines
1.3 KiB
C#
using BenchmarkDotNet.Attributes;
|
|
using BenchmarkDotNet.Running;
|
|
|
|
BenchmarkRunner.Run<DigitalRootBenchmarks>();
|
|
|
|
[SimpleJob, MemoryDiagnoser(false)]
|
|
public class DigitalRootBenchmarks
|
|
{
|
|
private const int Number = 2958171;
|
|
|
|
[Benchmark]
|
|
[Arguments(Number)]
|
|
public int DigitalRoot_Chars(int number)
|
|
{
|
|
while (number > 9)
|
|
{
|
|
var digits = number.ToString();
|
|
var sum = 0;
|
|
|
|
foreach (char digit in digits)
|
|
sum += int.Parse(digit.ToString());
|
|
|
|
number = sum;
|
|
}
|
|
|
|
return number;
|
|
}
|
|
|
|
[Benchmark]
|
|
[Arguments(Number)]
|
|
public int DigitalRoot_Standard(int number)
|
|
{
|
|
while (number > 9)
|
|
{
|
|
var sum = 0;
|
|
|
|
for (; number > 0; number /= 10)
|
|
sum += number % 10;
|
|
|
|
number = sum;
|
|
}
|
|
|
|
return number;
|
|
}
|
|
|
|
[Benchmark]
|
|
[Arguments(Number)]
|
|
public int DigitalRoot_Recursion(int number)
|
|
{
|
|
var sum = 0;
|
|
|
|
while (number > 0)
|
|
{
|
|
sum += number % 10;
|
|
number /= 10;
|
|
}
|
|
|
|
if (sum > 10) sum = DigitalRoot_Recursion(sum);
|
|
return sum;
|
|
}
|
|
|
|
[Benchmark]
|
|
[Arguments(Number)]
|
|
public int DigitalRoot_Optimal(int number)
|
|
{
|
|
int result = number % 9;
|
|
return result == 0 ? 9 : result;
|
|
}
|
|
}
|