Here are my RSA benchmark results:
Conclusion is that RSA key generation is expensive no matter what, but it's
20x-40x worse on mono.
.NET 4.0, Win 8.1 VM inside a Mac, Debug build, 3 trials average:
1024 27 ms
2048 80 ms
3072 673 ms
.NET 4.0, Win 8.1 VM inside a Mac, Release build, 3 trials average:
1024 14 ms
2048 94 ms
3072 1,273 ms
Mono 3.2.5 on Mac OSX, compiled by VS Debug, 3 trials average:
1024 505 ms
2048 4,718 ms
3072 42,972 ms
Mono 3.2.5 on Mac OSX, compiled by VS Release, 3 trials average:
1024 883 ms
2048 8,310 ms
3072 40,284 ms
Mono 3.2.5 on Mac OSX, compiled by xbuild Debug, 3 trials average:
1024 894 ms
2048 5,756 ms
3072 35,273 ms
Mono 3.2.5 on Mac OSX, compiled by xbuild Release, 3 trials average:
1024 1,215 ms
2048 12,966 ms
3072 18,952 ms
Code to generate these results:
using System;
using System.Collections.Generic;
using System.Security.Cryptography;
namespace FunWithRSAKeys
{
class Program
{
static void Main(string[] args)
{
const int numRuns = 3;
long beforeTicks;
long afterTicks;
RSACryptoServiceProvider RSACSP;
int[] keySizes = { 1024, 2048, 3072 };
Dictionary<int, double[]> results = new Dictionary<int, double[]>();
foreach (int keySize in keySizes)
results[keySize] = new double[numRuns];
for (int i = 0; i < numRuns; i++)
{
System.Console.WriteLine("-----------------------------");
foreach (int keySize in keySizes)
{
beforeTicks = DateTime.UtcNow.Ticks;
RSACSP = new RSACryptoServiceProvider(keySize);
RSACSP.ExportParameters(false); // Minimum effort to
guarantee key will actually be generated
afterTicks = DateTime.UtcNow.Ticks;
double seconds = (double)(afterTicks - beforeTicks) /
(double)TimeSpan.TicksPerSecond;
results[keySize][i] = seconds;
System.Console.WriteLine(keySize.ToString() + " " +
seconds.ToString());
}
}
System.Console.WriteLine("----------------------------- Results");
foreach(int keySize in keySizes)
{
System.Console.WriteLine(keySize.ToString() + " " +
avg(results[keySize]).ToString());
}
System.Console.WriteLine("-----------------------------");
System.Threading.Thread.Sleep(int.MaxValue);
}
static double avg(double[] values)
{
double result = 0;
foreach (double value in values)
result += value / values.Length;
return result;
}
}
}
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