Add file reader parallelization options

Author: SanderSade

QuickList/Application/Configuration.cs

@@ -59,6 +59,11 @@ internal sealed class Configuration
 
 		internal Status Status { get; set; }
 
+		/// <summary>
+		/// How many threads to run at once for file reader?
+		/// </summary>
+		internal int FileReaderParallelism { get; set; }
+
 
 		internal static Configuration Parse(string iniFile)
 		{
@@ -68,14 +73,17 @@ internal static Configuration Parse(string iniFile)
 				HeaderFile = IniReader.ReadValue("ListMagic", "HeaderFile", iniFile),
 				Trigger = IniReader.ReadValue("ListMagic", "trigger", iniFile),
 				OutputFolder = IniReader.ReadValue("ListMagic", "ListLocation", iniFile),
-				ShowUi = IniReader.ReadValue("ListMagic", "Auto", iniFile) == "N",
+				ShowUi = string.Compare(IniReader.ReadValue("ListMagic", "Auto", iniFile, "Y").Trim(), "N", StringComparison.OrdinalIgnoreCase) == 0,
 				ListName = Path.GetFileNameWithoutExtension(iniFile),
 				FileInfo = (FileInfoLevel)Enum.Parse(typeof(FileInfoLevel), IniReader.ReadValue("QuickList", "FileInfo", iniFile, nameof(FileInfoLevel.Size))),
 				FolderHandling = (FolderHandling)Enum.Parse(typeof(FolderHandling),
 					IniReader.ReadValue("QuickList", "FolderHandling", iniFile, nameof(FolderHandling.PartialFolders))),
 				ForceShellMedia = IniReader.ReadValue("QuickList", "ForceShellMedia", iniFile, "0") == "1"
 			};
 
+			int.TryParse(IniReader.ReadValue("QuickList", "FileReaderParallelism", "0"), out var fileReaderParallelism);
+			configuration.FileReaderParallelism = fileReaderParallelism <= 0 ? Environment.ProcessorCount : fileReaderParallelism;
+
 			var dirsFile = IniReader.ReadValue("ListMagic", "DirsFile", iniFile);
 
 			if (!File.Exists(dirsFile))
@@ -113,6 +121,7 @@ internal void Update()
 			IniReader.WriteValue("QuickList", "FolderHandling", FolderHandling.ToString(), IniFile);
 			IniReader.WriteValue("QuickList", "FileInfo", FileInfo.ToString(), IniFile);
 			IniReader.WriteValue("QuickList", "ForceShellMedia", ForceShellMedia ? "1" : "0", IniFile);
+			IniReader.WriteValue("QuickList", "FileReaderParallelism", FileReaderParallelism.ToString() , IniFile);
 		}
 	}
 }

QuickList/Application/FileReader.cs

@@ -135,7 +135,7 @@ private static bool FindNextFile(string path, out List<Entry> files)
 						if (!findData.cFileName.Equals(".", StringComparison.OrdinalIgnoreCase) && !findData.cFileName.Equals("..",
 								StringComparison.OrdinalIgnoreCase))
 						{
-							var fullPath = string.Concat(path, "\\", findData.cFileName);;
+							var fullPath = string.Concat(path, "\\", findData.cFileName);
 							// Check if this is a directory and not a symbolic link since symbolic links could lead to repeated files and folders as well as infinite loops.
 							if (findData.dwFileAttributes.HasFlag(FileAttributes.Directory) && !findData.dwFileAttributes.HasFlag(FileAttributes.ReparsePoint))
 							{
@@ -166,7 +166,7 @@ private static bool FindNextFile(string path, out List<Entry> files)
 		}
 
 
-		private static List<Entry> ParallelFindNextFile(string path)
+		private List<Entry> ParallelFindNextFile(string path)
 		{
 			var fileList = new ConcurrentBag<Entry>();
 			var directoryList = new List<string>(32);
@@ -199,7 +199,7 @@ private static List<Entry> ParallelFindNextFile(string path)
 
 					directoryList
 						.AsParallel()
-						.WithDegreeOfParallelism(Environment.ProcessorCount)
+						.WithDegreeOfParallelism(_configuration.FileReaderParallelism)
 						.WithExecutionMode(ParallelExecutionMode.ForceParallelism)
 						.ForAll(x =>
 								{

QuickList/Program.cs

@@ -57,9 +57,10 @@ private static void Main(params string[] parameters)
 				InputFolders = new List<string> { @"c:\temp\", @"C:\Dev" },
 				OutputFolder = @"c:\temp\out",
 				ListName = "audio",
-				IniFile = @"D:\mIRC\OmenServe\ListMagic\testaudio\testaudio.ini",
+				IniFile = @"c:\temp\out\testaudio.ini",
 				ShowUi = true,
-				ForceShellMedia = false
+				ForceShellMedia = false,
+				FileReaderParallelism = 1
 			};
 #endif
 			configuration.Validate();