Improve notification filter performance

src/OrchardCore.Modules/OrchardCore.DynamicCache/EventHandlers/DynamicCacheShapeDisplayEvents.cs

@@ -1,9 +1,9 @@
 using System.Collections.Generic;
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
+using Cysharp.Text;
 using Microsoft.AspNetCore.Html;
 using Microsoft.Extensions.Options;
-using OrchardCore.Abstractions.Pooling;
 using OrchardCore.DisplayManagement.Implementation;
 using OrchardCore.Environment.Cache;
 

src/OrchardCore.Modules/OrchardCore.DynamicCache/TagHelpers/DynamicCacheTagHelper.cs

@@ -1,11 +1,11 @@
 using System;
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
+using Cysharp.Text;
 using Microsoft.AspNetCore.Html;
 using Microsoft.AspNetCore.Mvc.TagHelpers.Cache;
 using Microsoft.AspNetCore.Razor.TagHelpers;
 using Microsoft.Extensions.Options;
-using OrchardCore.Abstractions.Pooling;
 using OrchardCore.Environment.Cache;
 
 namespace OrchardCore.DynamicCache.TagHelpers

src/OrchardCore/OrchardCore.ContentManagement.GraphQL/Queries/Types/ContentItemType.cs

@@ -1,10 +1,10 @@
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
+using Cysharp.Text;
 using GraphQL;
 using GraphQL.Types;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
-using OrchardCore.Abstractions.Pooling;
 using OrchardCore.Apis.GraphQL;
 using OrchardCore.ContentManagement.Display;
 using OrchardCore.ContentManagement.GraphQL.Options;

src/OrchardCore/OrchardCore.DisplayManagement/Notify/Notifier.cs

@@ -1,13 +1,14 @@
-using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Html;
 using Microsoft.AspNetCore.Mvc.Localization;
 using Microsoft.Extensions.Logging;
 
 namespace OrchardCore.DisplayManagement.Notify
 {
     public class Notifier : INotifier
     {
-        private readonly IList<NotifyEntry> _entries;
+        private readonly List<NotifyEntry> _entries;
         private readonly ILogger _logger;
 
         public Notifier(ILogger<Notifier> logger)
@@ -16,17 +17,21 @@ public Notifier(ILogger<Notifier> logger)
             _logger = logger;
         }
 
-        [Obsolete("This method will be removed in a later version. Use AddAsync()")]
-        // TODO The implementation for this is provided as an interface default implementation
-        // when the interface method is removed, replace this with AddAsync.
         public void Add(NotifyType type, LocalizedHtmlString message)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public ValueTask AddAsync(NotifyType type, LocalizedHtmlString message)
         {
             if (_logger.IsEnabled(LogLevel.Information))
             {
-                _logger.LogInformation("Notification '{NotificationType}' with message '{NotificationMessage}'", type, message.Value);
+                _logger.LogInformation("Notification '{NotificationType}' with message '{NotificationMessage}'", type, message.ToString());
             }
 
             _entries.Add(new NotifyEntry { Type = type, Message = message });
+
+            return ValueTask.CompletedTask;
         }
 
         public IList<NotifyEntry> List()

src/OrchardCore/OrchardCore.DisplayManagement/Notify/NotifyEntry.cs

@@ -1,3 +1,6 @@
+using System.Text.Encodings.Web;
+using System.Web;
+using Cysharp.Text;
 using Microsoft.AspNetCore.Html;
 
 namespace OrchardCore.DisplayManagement.Notify
@@ -12,7 +15,40 @@ public enum NotifyType
 
     public class NotifyEntry
     {
+        private (HtmlEncoder HtmlEncoder, string Message) _cache;
+
         public NotifyType Type { get; set; }
         public IHtmlContent Message { get; set; }
+
+        public string ToHtmlString(HtmlEncoder htmlEncoder)
+        {
+            // When the object is created from a cookie the message
+            // is an HtmlString so we can use this instead of using
+            // the TextWriter path.
+
+            if (Message is IHtmlString htmlString)
+            {
+                return htmlString.ToHtmlString();
+            }
+
+            // Cache the encoded version for the specified encoder.
+            // This is necessary as long as there will be string-based comparisons
+            // and the need of NotifyEntryComparer
+
+            var cache = _cache;
+
+            if (cache.Message != null && cache.HtmlEncoder == htmlEncoder)
+            {
+                return cache.Message;
+            }
+
+            using var stringWriter = new ZStringWriter();
+            Message.WriteTo(stringWriter, htmlEncoder);
+            stringWriter.Flush();
+
+            _cache = cache = new(htmlEncoder, stringWriter.ToString());
+
+            return cache.Message;
+        }
     }
 }

src/OrchardCore/OrchardCore.DisplayManagement/Notify/NotifyEntryComparer.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Text.Encodings.Web;
 
@@ -14,12 +15,12 @@ public NotifyEntryComparer(HtmlEncoder htmlEncoder)
 
         public bool Equals(NotifyEntry x, NotifyEntry y)
         {
-            return x.Type == y.Type && x.GetMessageAsString(_htmlEncoder) == y.GetMessageAsString(_htmlEncoder);
+            return x.Type == y.Type && x.ToHtmlString(_htmlEncoder) == y.ToHtmlString(_htmlEncoder);
         }
 
         public int GetHashCode(NotifyEntry obj)
         {
-            return obj.GetMessageAsString(_htmlEncoder).GetHashCode() & 23 * obj.Type.GetHashCode();
+            return HashCode.Combine(obj.ToHtmlString(_htmlEncoder), obj.Type);
         }
     }
 }

src/OrchardCore/OrchardCore.DisplayManagement/Notify/NotifyEntryConverter.cs

@@ -1,6 +1,4 @@
 using System;
-using System.IO;
-using System.Text;
 using System.Text.Encodings.Web;
 using System.Text.Json;
 using System.Text.Json.Nodes;
@@ -48,18 +46,11 @@ public override void Write(Utf8JsonWriter writer, NotifyEntry value, JsonSeriali
                 return;
             }
 
-            var o = new JsonObject();
-
-            // Serialize the message as it's an IHtmlContent
-            var stringBuilder = new StringBuilder();
-            using (var stringWriter = new StringWriter(stringBuilder))
+            var o = new JsonObject
             {
-                notifyEntry.Message.WriteTo(stringWriter, _htmlEncoder);
-            }
-
-            // Write all well-known properties
-            o.Add(nameof(NotifyEntry.Type), notifyEntry.Type.ToString());
-            o.Add(nameof(NotifyEntry.Message), notifyEntry.GetMessageAsString(_htmlEncoder));
+                { nameof(NotifyEntry.Type), notifyEntry.Type.ToString() },
+                { nameof(NotifyEntry.Message), notifyEntry.ToHtmlString(_htmlEncoder) }
+            };
 
             o.WriteTo(writer);
         }