Redesign conversion between JSON objects and ASP.NET models

ROADMAP.md

@@ -20,7 +20,7 @@ The need for breaking changes has blocked several efforts in the v4.x release, s
 - [x] Instrumentation [#1032](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1032)
 - [x] Optimized delete to-many [#1030](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1030)
 - [x] Support System.Text.Json [#664](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/664) [#999](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/999) [1077](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1077) [1078](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1078)
-- [ ] Optimize IIdentifiable to ResourceObject conversion [#1028](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1028) [#1024](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1024) [#233](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/233)
+- [x] Optimize IIdentifiable to ResourceObject conversion [#1028](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1028) [#1024](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1024) [#233](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/233)
 - [ ] Nullable reference types [#1029](https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/1029)
 
 Aside from the list above, we have interest in the following topics. It's too soon yet to decide whether they'll make it into v5.x or in a later major version.

benchmarks/Deserialization/DeserializationBenchmarkBase.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Design;
+using System.Text.Json;
+using JetBrains.Annotations;
+using JsonApiDotNetCore.Configuration;
+using JsonApiDotNetCore.Middleware;
+using JsonApiDotNetCore.Resources;
+using JsonApiDotNetCore.Resources.Annotations;
+using JsonApiDotNetCore.Serialization.JsonConverters;
+using JsonApiDotNetCore.Serialization.Request.Adapters;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace Benchmarks.Deserialization
+{
+    public abstract class DeserializationBenchmarkBase
+    {
+        protected readonly JsonSerializerOptions SerializerReadOptions;
+        protected readonly DocumentAdapter DocumentAdapter;
+
+        protected DeserializationBenchmarkBase()
+        {
+            var options = new JsonApiOptions();
+            IResourceGraph resourceGraph = new ResourceGraphBuilder(options, NullLoggerFactory.Instance).Add<ResourceA>().Build();
+            options.SerializerOptions.Converters.Add(new ResourceObjectConverter(resourceGraph));
+            SerializerReadOptions = ((IJsonApiOptions)options).SerializerReadOptions;
+
+            var serviceContainer = new ServiceContainer();
+            var resourceFactory = new ResourceFactory(serviceContainer);
+            var resourceDefinitionAccessor = new ResourceDefinitionAccessor(resourceGraph, serviceContainer);
+
+            serviceContainer.AddService(typeof(IResourceDefinitionAccessor), resourceDefinitionAccessor);
+            serviceContainer.AddService(typeof(IResourceDefinition<ResourceA>), new JsonApiResourceDefinition<ResourceA>(resourceGraph));
+
+            // ReSharper disable once VirtualMemberCallInConstructor
+            JsonApiRequest request = CreateJsonApiRequest(resourceGraph);
+            var targetedFields = new TargetedFields();
+
+            var resourceIdentifierObjectAdapter = new ResourceIdentifierObjectAdapter(resourceGraph, resourceFactory);
+            var relationshipDataAdapter = new RelationshipDataAdapter(resourceIdentifierObjectAdapter);
+            var resourceObjectAdapter = new ResourceObjectAdapter(resourceGraph, resourceFactory, options, relationshipDataAdapter);
+            var resourceDataAdapter = new ResourceDataAdapter(resourceDefinitionAccessor, resourceObjectAdapter);
+
+            var atomicReferenceAdapter = new AtomicReferenceAdapter(resourceGraph, resourceFactory);
+            var atomicOperationResourceDataAdapter = new ResourceDataInOperationsRequestAdapter(resourceDefinitionAccessor, resourceObjectAdapter);
+
+            var atomicOperationObjectAdapter = new AtomicOperationObjectAdapter(options, atomicReferenceAdapter,
+                atomicOperationResourceDataAdapter, relationshipDataAdapter);
+
+            var resourceDocumentAdapter = new DocumentInResourceOrRelationshipRequestAdapter(options, resourceDataAdapter, relationshipDataAdapter);
+            var operationsDocumentAdapter = new DocumentInOperationsRequestAdapter(options, atomicOperationObjectAdapter);
+
+            DocumentAdapter = new DocumentAdapter(request, targetedFields, resourceDocumentAdapter, operationsDocumentAdapter);
+        }
+
+        protected abstract JsonApiRequest CreateJsonApiRequest(IResourceGraph resourceGraph);
+
+        [UsedImplicitly(ImplicitUseTargetFlags.Members)]
+        public sealed class ResourceA : Identifiable
+        {
+            [Attr]
+            public bool Attribute01 { get; set; }
+
+            [Attr]
+            public char Attribute02 { get; set; }
+
+            [Attr]
+            public ulong? Attribute03 { get; set; }
+
+            [Attr]
+            public decimal Attribute04 { get; set; }
+
+            [Attr]
+            public float? Attribute05 { get; set; }
+
+            [Attr]
+            public string Attribute06 { get; set; }
+
+            [Attr]
+            public DateTime? Attribute07 { get; set; }
+
+            [Attr]
+            public DateTimeOffset? Attribute08 { get; set; }
+
+            [Attr]
+            public TimeSpan? Attribute09 { get; set; }
+
+            [Attr]
+            public DayOfWeek Attribute10 { get; set; }
+
+            [HasOne]
+            public ResourceA Single1 { get; set; }
+
+            [HasOne]
+            public ResourceA Single2 { get; set; }
+
+            [HasOne]
+            public ResourceA Single3 { get; set; }
+
+            [HasOne]
+            public ResourceA Single4 { get; set; }
+
+            [HasOne]
+            public ResourceA Single5 { get; set; }
+
+            [HasMany]
+            public ISet<ResourceA> Multi1 { get; set; }
+
+            [HasMany]
+            public ISet<ResourceA> Multi2 { get; set; }
+
+            [HasMany]
+            public ISet<ResourceA> Multi3 { get; set; }
+
+            [HasMany]
+            public ISet<ResourceA> Multi4 { get; set; }
+
+            [HasMany]
+            public ISet<ResourceA> Multi5 { get; set; }
+        }
+    }
+}