Review usage of string.Substring (part 1)

Reduced allocations by replacing string.Substring with ReadOnlySpan<char>.Slice

1 files changed, 7 insertions, 7 deletions

diff --git a/Emby.Drawing/ImageProcessor.cs b/Emby.Drawing/ImageProcessor.cs
index 8696cb280..f585b90ca 100644
--- a/Emby.Drawing/ImageProcessor.cs
+++ b/Emby.Drawing/ImageProcessor.cs
@@ -448,21 +448,21 @@ namespace Emby.Drawing
         /// or
         /// filename.
         /// </exception>
-        public string GetCachePath(string path, string filename)
+        public string GetCachePath(ReadOnlySpan<char> path, ReadOnlySpan<char> filename)
         {
-            if (string.IsNullOrEmpty(path))
+            if (path.IsEmpty)
             {
-                throw new ArgumentNullException(nameof(path));
+                throw new ArgumentException("Path can't be empty.", nameof(path));
             }
 
-            if (string.IsNullOrEmpty(filename))
+            if (path.IsEmpty)
             {
-                throw new ArgumentNullException(nameof(filename));
+                throw new ArgumentException("Filename can't be empty.", nameof(filename));
             }
 
-            var prefix = filename.Substring(0, 1);
+            var prefix = filename.Slice(0, 1);
 
-            return Path.Combine(path, prefix, filename);
+            return Path.Join(path, prefix, filename);
         }
 
         /// <inheritdoc />