Reduce string allocations by regex

3 files changed, 6 insertions, 7 deletions

diff --git a/Emby.Naming/Video/CleanDateTimeParser.cs b/Emby.Naming/Video/CleanDateTimeParser.cs
index 0ee633dcc..9a6c6e978 100644
--- a/Emby.Naming/Video/CleanDateTimeParser.cs
+++ b/Emby.Naming/Video/CleanDateTimeParser.cs
@@ -43,7 +43,7 @@ namespace Emby.Naming.Video
                 && match.Groups.Count == 5
                 && match.Groups[1].Success
                 && match.Groups[2].Success
-                && int.TryParse(match.Groups[2].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var year))
+                && int.TryParse(match.Groups[2].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var year))
             {
                 result = new CleanDateTimeResult(match.Groups[1].Value.TrimEnd(), year);
                 return true;
diff --git a/Emby.Naming/Video/ExtraRuleResolver.cs b/Emby.Naming/Video/ExtraRuleResolver.cs
index 21d0da364..3219472ef 100644
--- a/Emby.Naming/Video/ExtraRuleResolver.cs
+++ b/Emby.Naming/Video/ExtraRuleResolver.cs
@@ -56,7 +56,7 @@ namespace Emby.Naming.Video
                 }
                 else if (rule.RuleType == ExtraRuleType.Regex)
                 {
-                    var filename = Path.GetFileName(path);
+                    var filename = Path.GetFileName(path.AsSpan());
 
                     var isMatch = Regex.IsMatch(filename, rule.Token, RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
diff --git a/Emby.Naming/Video/VideoListResolver.cs b/Emby.Naming/Video/VideoListResolver.cs
index 01e383d1c..8247c374d 100644
--- a/Emby.Naming/Video/VideoListResolver.cs
+++ b/Emby.Naming/Video/VideoListResolver.cs
@@ -176,16 +176,15 @@ namespace Emby.Naming.Video
             }
 
             // There are no span overloads for regex unfortunately
-            var tmpTestFilename = testFilename.ToString();
-            if (CleanStringParser.TryClean(tmpTestFilename, namingOptions.CleanStringRegexes, out var cleanName))
+            if (CleanStringParser.TryClean(testFilename.ToString(), namingOptions.CleanStringRegexes, out var cleanName))
             {
-                tmpTestFilename = cleanName.Trim();
+                testFilename = cleanName.AsSpan().Trim();
             }
 
             // The CleanStringParser should have removed common keywords etc.
-            return string.IsNullOrEmpty(tmpTestFilename)
+            return testFilename.IsEmpty
                    || testFilename[0] == '-'
-                   || Regex.IsMatch(tmpTestFilename, @"^\[([^]]*)\]", RegexOptions.Compiled);
+                   || Regex.IsMatch(testFilename, @"^\[([^]]*)\]", RegexOptions.Compiled);
         }
     }
 }