Perf: Remove unnecessary path checks

src/Microsoft.AspNetCore.Server.Kestrel/Http/Frame.cs

@@ -919,7 +919,6 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
                     // URI was encoded, unescape and then parse as utf8
                     pathEnd = UrlPathDecoder.Unescape(pathBegin, pathEnd);
                     requestUrlPath = pathBegin.GetUtf8String(pathEnd);
-                    requestUrlPath = PathNormalizer.NormalizeToNFC(requestUrlPath);
                 }
                 else
                 {

src/Microsoft.AspNetCore.Server.Kestrel/Http/PathNormalizer.cs

@@ -9,16 +9,6 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
 {
     public static class PathNormalizer
     {
-        public static string NormalizeToNFC(string path)
-        {
-            if (!path.IsNormalized(NormalizationForm.FormC))
-            {
-                path = path.Normalize(NormalizationForm.FormC);
-            }
-
-            return path;
-        }
-
         public static string RemoveDotSegments(string path)
         {
             if (ContainsDotSegments(path))

src/Microsoft.AspNetCore.Server.Kestrel/ServerAddress.cs

@@ -156,8 +156,6 @@ namespace Microsoft.AspNetCore.Server.Kestrel
                 serverAddress.PathBase = url.Substring(pathDelimiterEnd);
             }
 
-            serverAddress.PathBase = PathNormalizer.NormalizeToNFC(serverAddress.PathBase);
-
             return serverAddress;
         }
 

test/Microsoft.AspNetCore.Server.KestrelTests/PathNormalizerTests.cs

@@ -51,13 +51,5 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             var result = PathNormalizer.RemoveDotSegments(input);
             Assert.Equal(expected, result);
         }
-
-        [Fact]
-        public void NormalizesToNFC()
-        {
-            var result = PathNormalizer.NormalizeToNFC("/\u0041\u030A");
-            Assert.True(result.IsNormalized(NormalizationForm.FormC));
-            Assert.Equal("/\u00C5", result);
-        }
     }
 }

test/Microsoft.AspNetCore.Server.KestrelTests/RequestTargetProcessingTests.cs

@@ -17,17 +17,17 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
 
             using (var server = new TestServer(async context =>
             {
-                Assert.Equal("/\u00C5", context.Request.PathBase.Value);
+                Assert.Equal("/A", context.Request.PathBase.Value);
-                Assert.Equal("/B/\u00C5", context.Request.Path.Value);
+                Assert.Equal("/B/C", context.Request.Path.Value);
 
                 context.Response.Headers["Content-Length"] = new[] { "11" };
                 await context.Response.WriteAsync("Hello World");
-            }, testContext, "http://127.0.0.1:0/\u0041\u030A"))
+            }, testContext, "http://127.0.0.1:0/A"))
             {
                 using (var connection = server.CreateConnection())
                 {
                     await connection.SendEnd(
-                        "GET /%41%CC%8A/A/../B/%41%CC%8A HTTP/1.0",
+                        "GET /A/0/../B/C HTTP/1.0",
                         "",
                         "");
                     await connection.ReceiveEnd(

test/Microsoft.AspNetCore.Server.KestrelTests/ServerAddressTests.cs

@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using System.Text;
 using Microsoft.AspNetCore.Server.Kestrel;
 using Xunit;
 
@@ -68,15 +67,6 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             Assert.Equal(toString ?? url, serverAddress.ToString());
         }
 
-        [Fact]
-        public void PathBaseIsNormalized()
-        {
-            var serverAddres = ServerAddress.FromUrl("http://localhost:8080/p\u0041\u030Athbase");
-
-            Assert.True(serverAddres.PathBase.IsNormalized(NormalizationForm.FormC));
-            Assert.Equal("/p\u00C5thbase", serverAddres.PathBase);
-        }
-
         [Fact]
         public void WithHostReturnsNewInstanceWithDifferentHost()
         {