Hot-path for strings

Author: linkdotnet

src/LinkDotNet.StringBuilder/ValueStringBuilder.AppendJoin.cs

@@ -107,6 +107,10 @@ private void AppendInternal<T>(T value)
         {
             AppendSpanFormattable(spanFormattable);
         }
+        else if (value is string s)
+        {
+            Append(s.AsSpan());
+        }
         else
         {
             Append(value?.ToString());

src/LinkDotNet.StringBuilder/ValueStringBuilder.Concat.Helper.cs

@@ -8,7 +8,7 @@ public ref partial struct ValueStringBuilder
     /// Concatenates multiple objects together.
     /// </summary>
     /// <param name="values">Values, which will be concatenated together.</param>
-    /// <typeparam name="T">Any given type, which can be translated to string.</typeparam>
+    /// <typeparam name="T">Any given type, which can be translated to <see cref="string"/>.</typeparam>
     /// <returns>Concatenated string or an empty string if <see cref="values"/> is empty.</returns>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static string Concat<T>(params T[] values)