byte[] GetCompressedFile(byte[] uncompressed)
{
var compressed = new MemoryStream();
using (var compressor = new SnappyDOTNETStream(compressed, CompressionMode.Compress, true))
compressor.Write(uncompressed, 0, uncompressed.Length);
compressed.Close();
return(compressed.ToArray());
}
public void Decompression()
{
Benchmark.Run("Decompressing", 1024 * 1024 * 2, benchmark =>
{
var stream = new RepeaterStream(GetCompressedFile(benchmark.Input));
var decompressor = new SnappyDOTNETStream(stream, CompressionMode.Decompress);
var decompressed = new byte[benchmark.Input.Length];
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
ReadFully(decompressor, decompressed, 0, decompressed.Length);
}
benchmark.Stopwatch.Stop();
});
}
public void Compression()
{
Benchmark.Run("Compressing", 1024 * 1024 * 2, benchmark =>
{
var stream = new NullStream();
var compressor = new SnappyDOTNETStream(stream, CompressionMode.Compress);
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
compressor.Write(benchmark.Input, 0, benchmark.Input.Length);
compressor.Flush();
}
benchmark.Stopwatch.Stop();
benchmark.Note = String.Format(" ({0:0.00 %})", stream.Written / (double)benchmark.Input.Length / benchmark.Iterations);
});
}
public void Twister()
{
var testdata = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }.Select(x => _dataCreator.GenerateTestData(1024 * 512 * x)).ToArray();
long totalData = 0;
var stopwatch = new Stopwatch();
stopwatch.Start();
while (stopwatch.Elapsed < TimeSpan.FromSeconds(3))
{
int count = Random.Next(0, 21);
var sequence = Enumerable.Range(0, count).Select(n => testdata[Random.Next(testdata.Length)]).ToArray();
totalData += sequence.Sum(f => f.Length);
var stream = new RandomChunkStream();
ManualResetEvent doneReading = new ManualResetEvent(false);
ThreadPool.QueueUserWorkItem(ctx =>
{
try
{
using (var decompressor = new SnappyDOTNETStream(stream, CompressionMode.Decompress))
{
foreach (var file in sequence)
{
var decompressed = new byte[file.Length];
if (decompressed.Length < 500)
{
for (int i = 0; i < decompressed.Length; ++i)
{
decompressed[i] = checked ((byte)decompressor.ReadByte());
}
}
else
{
ReadAll(decompressor, decompressed, 0, decompressed.Length);
}
CheckBuffers(file, decompressed);
}
Assert.AreEqual(-1, decompressor.ReadByte());
}
doneReading.Set();
}
catch (Exception e)
{
Console.WriteLine("Read thread failed: {0}", e);
throw;
}
});
using (var compressor = new SnappyDOTNETStream(stream, CompressionMode.Compress))
{
foreach (var file in sequence)
{
if (file.Length < 500)
{
for (int i = 0; i < file.Length; ++i)
{
compressor.WriteByte(file[i]);
}
}
else
{
compressor.Write(file, 0, file.Length);
}
if (WriteRandom.Next(10) == 0)
{
compressor.Flush();
}
}
{
if (WriteRandom.Next(2) == 0)
{
compressor.Flush();
}
}
}
doneReading.WaitOne();
}
stopwatch.Stop();
Console.WriteLine("Ran {0} MB through the stream, that's {1:0.0} MB/s", totalData / 1024 / 1024, totalData / stopwatch.Elapsed.TotalSeconds / 1024 / 1024);
}
