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Use cached stream. Gives a 600% speed boost on analyze.

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This commit is contained in:
Natalia Portillo
2017-06-07 18:23:30 +01:00
parent 6249e9e331
commit 0c1f05dacc
2 changed files with 14 additions and 27 deletions
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8
DiscImageChef.Filters/GZip.cs
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@@ -44,6 +44,7 @@ namespace DiscImageChef.Filters
DateTime creationTime;
bool opened;
uint decompressedSize;
Stream zStream;
public GZip()
{
@@ -67,9 +68,7 @@ namespace DiscImageChef.Filters
public override Stream GetDataForkStream()
{
// Otherwise base stream is not at correct position and deflate throws errors
dataStream.Seek(0, SeekOrigin.Begin);
return new ForcedSeekStream<GZipStream>(decompressedSize, dataStream, CompressionMode.Decompress);
return zStream;
}
public override string GetPath()
@@ -142,6 +141,7 @@ namespace DiscImageChef.Filters
decompressedSize = isize;
creationTime = DateHandlers.UNIXUnsignedToDateTime(mtime);
lastWriteTime = creationTime;
zStream = new ForcedSeekStream<GZipStream>(decompressedSize, dataStream, CompressionMode.Decompress);
opened = true;
}
@@ -167,6 +167,7 @@ namespace DiscImageChef.Filters
decompressedSize = isize;
creationTime = DateHandlers.UNIXUnsignedToDateTime(mtime);
lastWriteTime = creationTime;
zStream = new ForcedSeekStream<GZipStream>(decompressedSize, dataStream, CompressionMode.Decompress);
opened = true;
}
@@ -193,6 +194,7 @@ namespace DiscImageChef.Filters
FileInfo fi = new FileInfo(path);
creationTime = fi.CreationTimeUtc;
lastWriteTime = DateHandlers.UNIXUnsignedToDateTime(mtime);
zStream = new ForcedSeekStream<GZipStream>(decompressedSize, dataStream, CompressionMode.Decompress);
opened = true;
}