diff --git a/src/TypeNameInterpretation/Delimiters.cs b/src/TypeNameInterpretation/Delimiters.cs
index 9ff9d43..24d0030 100644
--- a/src/TypeNameInterpretation/Delimiters.cs
+++ b/src/TypeNameInterpretation/Delimiters.cs
@@ -8,6 +8,7 @@ static class Delimiters
 {
 #if NET
 	public static SearchValues<char> All { get; } = SearchValues.Create(_allDelimiterChars);
+	public static SearchValues<char> AssemblySearch { get; } = SearchValues.Create(_allDelimiterChars.AsSpan(0, 5));
 	public static SearchValues<char> Quote { get; } = SearchValues.Create(_allDelimiterChars.AsSpan(0, 2));
 #else
 	public static ReadOnlySpan<char> All => _allDelimiterChars.AsSpan();
diff --git a/src/TypeNameInterpretation/InsParser.cs b/src/TypeNameInterpretation/InsParser.cs
index 5de6cee..ff17049 100644
--- a/src/TypeNameInterpretation/InsParser.cs
+++ b/src/TypeNameInterpretation/InsParser.cs
@@ -323,6 +323,19 @@ int LocateStartOfAssembly(int index)
 
 			while (index < _buffer.Length)
 			{
+#if NET
+				// Fast forward to the next meaningful char.
+				// This generally improves the performance in .NET Core but slows down .Net Framework.
+				var i = _buffer.Slice(index).IndexOfAny(Delimiters.AssemblySearch);
+
+				if (i < 0)
+				{
+					return -1;
+				}
+
+				index += i;
+#endif
+
 				var c = _buffer[index];
 
 				if (c == '\\')