Class SevenZipLZMA2CompressionSettings
Namespace: Aspose.Zip.Saving
Assembly: Aspose.Zip.dll (25.2.0)
Settings needed for 7z compressor or decompressor to work.
public class SevenZipLZMA2CompressionSettings : SevenZipCompressionSettingsInheritance
object ← SevenZipCompressionSettings ← SevenZipLZMA2CompressionSettings
Inherited Members
SevenZipCompressionSettings.Method, object.GetType(), object.MemberwiseClone(), object.ToString(), object.Equals(object?), object.Equals(object?, object?), object.ReferenceEquals(object?, object?), object.GetHashCode()
Remarks
LZMA2 supports multiple runs of compressed LZMA data and uncompressed data.
See more: https://en.wikipedia.org/wiki/Lempel–Ziv–Markov_chain_algorithm
Constructors
SevenZipLZMA2CompressionSettings(int)
Instantiates settings for LZMA2 compression method within 7z archive.
public SevenZipLZMA2CompressionSettings(int dictionarySize = 16777216)Parameters
dictionarySize int
Size of history buffer, must be between 4096 and 1073741824.
Remarks
The bigger the dictionary, the better the compression ratio usually is, but dictionaries bigger than the uncompressed data are waste of RAM.
Exceptions
dictionarySize is too big or too small.
SevenZipLZMA2CompressionSettings(int, int)
Instantiates settings for LZMA2 compression method within 7z archive.
public SevenZipLZMA2CompressionSettings(int dictionarySize, int fastBytes = 32)Parameters
dictionarySize int
Size of history buffer, must be between 4096 and 1073741824.
fastBytes int
Controls number of fast bytes used by the LZMA2 compressors. A larger number of fast bytes can provide a better compression ratio at the expense of compression speed.
Remarks
The bigger the dictionary, the better the compression ratio usually is, but dictionaries bigger than the uncompressed data are waste of RAM.
Exceptions
dictionarySize is too big or too small, or fastBytes is too big or too small.
Properties
CompressionThreads
Gets or sets compression thread count. If the value greater than 1, multithreading compression will be used.
public int CompressionThreads { get; set; }Property Value
Remarks
Do not set this number more than CPU cores.
Exceptions
The number of threads is more than 32.
DictionarySize
Dictionary (history buffer) size indicates how many bytes of the recently processed uncompressed data is kept in memory.
public int DictionarySize { get; }Property Value
Remarks
The bigger the dictionary, the better the compression ratio usually is, but dictionaries bigger than the uncompressed data are waste of RAM.
FastBytes
Gets the controls number of fast bytes used by the LZMA2 compressor.
public int FastBytes { get; }Property Value
Method
Gets compression or decompression method.
public override SevenZipCompressionMethod Method { get; }