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Code Issues Releases Wiki Activity

Avoid MemoryStream overhead for incoming non-MemoryStream in ImportTask

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This commit is contained in:
Dean Herbert 2023-09-14 13:29:29 +09:00
parent f90f2491c3
commit b5902a8736
1 changed files with 14 additions and 24 deletions
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38
osu.Game/Database/ImportTask.cs
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@ -46,9 +46,19 @@ namespace osu.Game.Database
/// </summary>
public ArchiveReader GetReader()
{
return Stream != null
? getReaderFrom(Stream)
: getReaderFrom(Path);
if (Stream == null)
return getReaderFromPath(Path);
if (Stream is MemoryStream memoryStream)
{
if (ZipUtils.IsZipArchive(memoryStream))
return new ZipArchiveReader(memoryStream, Path);
return new LegacyByteArrayReader(memoryStream.ToArray(), Path);
}
// This isn't used in any current path. May need to reconsider for performance reasons (ie. if we don't expect the incoming stream to be copied out).
return new LegacyByteArrayReader(Stream.ReadAllBytesToArray(), Path);
}
/// <summary>
@ -60,32 +70,12 @@ namespace osu.Game.Database
File.Delete(Path);
}
/// <summary>
/// Creates an <see cref="ArchiveReader"/> from a stream.
/// </summary>
/// <param name="stream">A seekable stream containing the archive content.</param>
/// <returns>A reader giving access to the archive's content.</returns>
private ArchiveReader getReaderFrom(Stream stream)
{
if (!(stream is MemoryStream memoryStream))
{
// This isn't used in any current path. May need to reconsider for performance reasons (ie. if we don't expect the incoming stream to be copied out).
memoryStream = new MemoryStream(stream.ReadAllBytesToArray());
stream.Dispose();
}
if (ZipUtils.IsZipArchive(memoryStream))
return new ZipArchiveReader(memoryStream, Path);
return new LegacyByteArrayReader(memoryStream.ToArray(), Path);
}
/// <summary>
/// Creates an <see cref="ArchiveReader"/> from a valid storage path.
/// </summary>
/// <param name="path">A file or folder path resolving the archive content.</param>
/// <returns>A reader giving access to the archive's content.</returns>
private ArchiveReader getReaderFrom(string path)
private ArchiveReader getReaderFromPath(string path)
{
if (ZipUtils.IsZipArchive(path))
return new ZipArchiveReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read), System.IO.Path.GetFileName(path));