From b176beb88e22a36cc056439ac2a4df4fbe68f2c1 Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Fri, 6 Oct 2023 00:40:09 +0200
Subject: Reduce string allocations

Some simple changes to reduce the number of allocated strings
---
 .../Attachments/AttachmentExtractor.cs             | 36 +++-------------------
 MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs |  6 ++--
 2 files changed, 6 insertions(+), 36 deletions(-)

(limited to 'MediaBrowser.MediaEncoding')

diff --git a/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs b/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
index 989e386a5..0ec0c84d4 100644
--- a/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
+++ b/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
@@ -1,4 +1,3 @@
-#nullable disable
 #pragma warning disable CS1591
 
 using System;
@@ -23,7 +22,7 @@ using Microsoft.Extensions.Logging;
 
 namespace MediaBrowser.MediaEncoding.Attachments
 {
-    public class AttachmentExtractor : IAttachmentExtractor, IDisposable
+    public sealed class AttachmentExtractor : IAttachmentExtractor
     {
         private readonly ILogger<AttachmentExtractor> _logger;
         private readonly IApplicationPaths _appPaths;
@@ -34,8 +33,6 @@ namespace MediaBrowser.MediaEncoding.Attachments
         private readonly ConcurrentDictionary<string, SemaphoreSlim> _semaphoreLocks =
             new ConcurrentDictionary<string, SemaphoreSlim>();
 
-        private bool _disposed = false;
-
         public AttachmentExtractor(
             ILogger<AttachmentExtractor> logger,
             IApplicationPaths appPaths,
@@ -296,7 +293,7 @@ namespace MediaBrowser.MediaEncoding.Attachments
 
             ArgumentException.ThrowIfNullOrEmpty(outputPath);
 
-            Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
+            Directory.CreateDirectory(Path.GetDirectoryName(outputPath) ?? throw new ArgumentException("Path can't be a root directory.", nameof(outputPath)));
 
             var processArgs = string.Format(
                 CultureInfo.InvariantCulture,
@@ -391,33 +388,8 @@ namespace MediaBrowser.MediaEncoding.Attachments
                 filename = (mediaPath + attachmentStreamIndex.ToString(CultureInfo.InvariantCulture)).GetMD5().ToString("D", CultureInfo.InvariantCulture);
             }
 
-            var prefix = filename.Substring(0, 1);
-            return Path.Combine(_appPaths.DataPath, "attachments", prefix, filename);
-        }
-
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        /// <summary>
-        /// Releases unmanaged and - optionally - managed resources.
-        /// </summary>
-        /// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
-        protected virtual void Dispose(bool disposing)
-        {
-            if (_disposed)
-            {
-                return;
-            }
-
-            if (disposing)
-            {
-            }
-
-            _disposed = true;
+            var prefix = filename.AsSpan(0, 1);
+            return Path.Join(_appPaths.DataPath, "attachments", prefix, filename);
         }
     }
 }
diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index 346e97ae1..59c350561 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
@@ -316,10 +316,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
             {
                 var files = _fileSystem.GetFilePaths(path, recursive);
 
-                var excludeExtensions = new[] { ".c" };
-
-                return files.FirstOrDefault(i => string.Equals(Path.GetFileNameWithoutExtension(i), filename, StringComparison.OrdinalIgnoreCase)
-                                                    && !excludeExtensions.Contains(Path.GetExtension(i) ?? string.Empty));
+                return files.FirstOrDefault(i => Path.GetFileNameWithoutExtension(i.AsSpan()).Equals(filename, StringComparison.OrdinalIgnoreCase)
+                                                    && !Path.GetExtension(i.AsSpan()).Equals(".c", StringComparison.OrdinalIgnoreCase));
             }
             catch (Exception)
             {
-- 
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