GZip 压缩测试

来源：互联网发布：数据透视表求和显示0 编辑：程序博客网时间：2024/04/29 23:08

用.net 自带的 GZipStream 测试，压缩比率用默认值进行测试

对于3K以下的数据进行压缩，发现数据会越压缩越大，对于大于3K的数据进行压缩才会有效果。

而用第三主工具 ICSharpCode.SharpZipLib; 进行压缩，如果都是用默认的值的话，发现效率跟自带的差挺多的。一个数据级别

/// <summary>
/// GZip 压缩
/// </summary>
/// <param name="inBytes"></param>
/// <returns></returns>
public static byte[] GZipCompress(byte[] inBytes)
{

MemoryStream outStream = new MemoryStream();

using (MemoryStream intStream = new MemoryStream(inBytes))
{

using (GZipStream Compress =new GZipStream(outStream, CompressionMode.Compress))
{

intStream.CopyTo(Compress);
}

}

return outStream.ToArray();

}

/// <summary>
/// GZip 解压
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
public static byte[] GZipDecompress(byte[] inStream)
{

byte[] result = null;

MemoryStream compressedStream = new MemoryStream(inStream);

using (MemoryStream outStream = new MemoryStream())
{

using (GZipStream Decompress = new GZipStream(compressedStream, CompressionMode.Decompress))
{

Decompress.CopyTo(outStream);

result = outStream.ToArray();

}

}

return result;

}

/// <summary>
/// 压缩
/// </summary>
/// <param name="bt"></param>
/// <returns></returns>
public static byte[] t1(byte[] bt)
{
MemoryStream outStream = new MemoryStream();

using (MemoryStream intStream = new MemoryStream(bt))
{

using (ICSharpCode.SharpZipLib.GZip.GZipOutputStream Compress = new ICSharpCode.SharpZipLib.GZip.GZipOutputStream(outStream))
{

intStream.CopyTo(Compress);
}

}

return outStream.ToArray();
}

/// <summary>
/// 解压
/// </summary>
/// <param name="bt"></param>
/// <returns></returns>
public static byte[] t2(byte[] bt)
{
byte[] result = null;
MemoryStream compressedStream = new MemoryStream(bt);
using (MemoryStream outStream = new MemoryStream())
{

using (ICSharpCode.SharpZipLib.GZip.GZipInputStream Decompress = new ICSharpCode.SharpZipLib.GZip.GZipInputStream(compressedStream))
{

Decompress.CopyTo(outStream);

result = outStream.ToArray();

}

}
return result;
}