private static void Test(string directory, ILZ4Compressor compressor, ILZ4Decompressor decompressor)
{
var w = new Stopwatch();
var dw = new Stopwatch();
long compressedTotal = 0;
long uncompressedTotal = 0;
for(int j=0;j<10;j++)
foreach (var bytes in Read(directory))
{
uncompressedTotal += bytes.Length;
byte[] compressed = new byte[compressor.CalculateMaxCompressedLength(bytes.Length)];
w.Start();
int compressedLength = compressor.Compress(bytes, compressed);
compressedTotal += compressedLength;
w.Stop();
byte[] uncompressed = new byte[bytes.Length];
dw.Start();
decompressor.DecompressKnownSize(compressed, uncompressed, uncompressed.Length);
dw.Stop();
for (int i = 0; i < uncompressed.Length; i++)
{
if (uncompressed[i] != bytes[i])
throw new Exception("Original bytes and decompressed bytes differ starting at byte " + i);
}
}
Console.WriteLine("Ratio = " + compressedTotal * 1.0 / uncompressedTotal);
Console.WriteLine("Compression Time (MB / sec) = " + uncompressedTotal / 1024.0 / 1024.0 / w.Elapsed.TotalSeconds);
Console.WriteLine("Uncompression Time (MB / sec) = " + uncompressedTotal / 1024.0 / 1024.0 / dw.Elapsed.TotalSeconds);
}
/// <summary>
/// Compresses the data
/// </summary>
/// <param name="data">The data to compress</param>
/// <param name="offset">The position where the data begins</param>
/// <param name="length">The length to compress</param>
/// <returns></returns>
public override byte[] Encode(ref byte[] data, ref uint offset, ref uint length, ref PacketHeader packetHeader)
{
byte[] compressed = new byte[Lz4Compressor.CalculateMaxCompressedLength((int)length)];
int CompressedSize = Lz4Compressor.Compress(data, (int)offset, (int)length, compressed, 0);
if (CompressedSize < length)
{
offset = 0;
length = (uint)CompressedSize;
return(compressed);
}
return(data);
}
private static void Test(string directory, ILZ4Compressor compressor, ILZ4Decompressor decompressor)
{
var w = new Stopwatch();
var dw = new Stopwatch();
long compressedTotal = 0;
long uncompressedTotal = 0;
for (int j = 0; j < 10; j++)
{
foreach (var bytes in Read(directory))
{
uncompressedTotal += bytes.Length;
byte[] compressed = new byte[compressor.CalculateMaxCompressedLength(bytes.Length)];
w.Start();
int compressedLength = compressor.Compress(bytes, compressed);
compressedTotal += compressedLength;
w.Stop();
byte[] uncompressed = new byte[bytes.Length];
dw.Start();
decompressor.DecompressKnownSize(compressed, uncompressed, uncompressed.Length);
dw.Stop();
for (int i = 0; i < uncompressed.Length; i++)
{
if (uncompressed[i] != bytes[i])
{
throw new Exception("Original bytes and decompressed bytes differ starting at byte " + i);
}
}
}
}
Console.WriteLine("Ratio = " + compressedTotal * 1.0 / uncompressedTotal);
Console.WriteLine("Compression Time (MB / sec) = " + uncompressedTotal / 1024.0 / 1024.0 / w.Elapsed.TotalSeconds);
Console.WriteLine("Uncompression Time (MB / sec) = " + uncompressedTotal / 1024.0 / 1024.0 / dw.Elapsed.TotalSeconds);
}