private HashAlgorithm GetHash()
{
switch (Type)
{
case ChecksumType.Murmur128:
return(Murmur128.CreateMurmur());
case ChecksumType.Md5:
return(MD5.Create());
default:
throw new NotImplementedException("Unknown checksum type: " + Type);
}
}
internal static void Run()
{
const int iterations = 0x20000;
const int testSize = 0x10000;
List <long> timeMurmur = new List <long>(iterations);
List <long> timeAdler = new List <long>(iterations);
List <long> timeMd5 = new List <long>(iterations);
byte[] randBytes = new byte[testSize];
var rnd = new Random();
var watchMurmur = new Stopwatch();
var watchAdler = new Stopwatch();
var watchMd5 = new Stopwatch();
bool dry = true;
DoRun:
for (int i = 0; i < iterations; i++)
{
rnd.NextBytes(randBytes);
{
var murmur = Murmur128.CreateMurmur();
watchMurmur.Restart();
murmur.ComputeHash(randBytes);
watchMurmur.Stop();
if (!dry)
{
timeMurmur.Add(watchMurmur.ElapsedTicks);
}
}
{
var adler = new Adler32();
watchAdler.Restart();
adler.Update(randBytes);
watchAdler.Stop();
if (!dry)
{
timeAdler.Add(watchAdler.ElapsedTicks);
}
}
{
var md5 = MD5.Create();
watchMd5.Restart();
md5.ComputeHash(randBytes);
watchMd5.Stop();
if (!dry)
{
timeMd5.Add(watchMd5.ElapsedTicks);
}
}
if (i == 0x1000 && dry)
{
dry = false;
goto DoRun;
}
}
var avgMurmur = TimeSpan.FromTicks(Convert.ToInt64(timeMurmur.Average()));
var avgAdler = TimeSpan.FromTicks(Convert.ToInt64(timeAdler.Average()));
var avgMd5 = TimeSpan.FromTicks(Convert.ToInt64(timeMd5.Average()));
Console.WriteLine("Average murmur:\t" + avgMurmur);
Console.WriteLine("Average adler:\t" + avgAdler);
Console.WriteLine("Average md5:\t" + avgMd5);
Console.ReadKey();
}