private static void MemoryMappedFile()
{
//IF RUNNING IN MONO REMEMBER THAT YOU HAVE TO EXPORT LD_LIBRARY_PATH TO POINT TO MONO LIB FOLDER FOR POSIXHELPER.SO
Console.WriteLine("Memory Mapped File.");
var filename = @"fofadasfddsho";
var size = 6000 * MEGABYTE;
using(var file = File.Open(filename, FileMode.OpenOrCreate)) {
file.SetLength(size + 1);
}
using (
var memmap = System.IO.MemoryMappedFiles.MemoryMappedFile.CreateFromFile(filename, FileMode.OpenOrCreate, "MyMap23", size,
MemoryMappedFileAccess.ReadWrite))
{
using (var view = memmap.CreateViewAccessor(0, size, MemoryMappedFileAccess.ReadWrite))
{
var watch = new Stopwatch();
watch.Start();
var filter = new BloomFilter(view.SafeMemoryMappedViewHandle.DangerousGetHandle(), size/4,
new IHasher[] {new Murmur3AUnsafe(), new XXHashUnsafe()});
for (int i = 0; i < 400000; i++)
{
var bytes = Guid.NewGuid().ToByteArray();
filter.Add(bytes);
if (!filter.Contains(bytes))
{
throw new Exception("broken");
}
if (i%100000 == 0)
{
Console.Write(".");
}
}
Console.WriteLine();
Console.WriteLine(watch.Elapsed);
}
}
File.Delete(filename);
}
private static unsafe void UnmanagedMemory()
{
Console.WriteLine("Unmanaged Memory");
const int size = (int) (500*MEGABYTE);
var watch = new Stopwatch();
watch.Start();
var ptr = Marshal.AllocHGlobal(size);
var filter = new BloomFilter(ptr, size/4,
new IHasher[] {new Murmur3AUnsafe(), new XXHashUnsafe()});
for (int i = 0; i < 1000000; i++)
{
var bytes = Guid.NewGuid().ToByteArray();
filter.Add(bytes);
if (!filter.Contains(bytes))
{
throw new Exception("broken");
}
if (i%100000 == 0)
{
Console.Write(".");
}
}
Console.WriteLine();
Console.WriteLine(watch.Elapsed);
Marshal.FreeHGlobal(ptr);
}