Fixed: Significantly improved api performance.

src/NzbDrone.Api/Profiles/ProfileResource.cs

@@ -1,7 +1,9 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using NzbDrone.Api.REST;
 using NzbDrone.Core.Parser;
+using NzbDrone.Core.Profiles;
 using NzbDrone.Core.Qualities;
 
 namespace NzbDrone.Api.Profiles
@@ -19,4 +21,64 @@ namespace NzbDrone.Api.Profiles
         public Quality Quality { get; set; }
         public bool Allowed { get; set; }
     }
+
+    public static class ProfileResourceMapper
+    {
+        public static ProfileResource ToResource(this Profile model)
+        {
+            if (model == null) return null;
+
+            return new ProfileResource
+            {
+                Id = model.Id,
+
+                Name = model.Name,
+                Cutoff = model.Cutoff,
+                Items = model.Items.ConvertAll(ToResource),
+                Language = model.Language
+            };
+        }
+
+        public static ProfileQualityItemResource ToResource(this ProfileQualityItem model)
+        {
+            if (model == null) return null;
+
+            return new ProfileQualityItemResource
+            {
+                Quality = model.Quality,
+                Allowed = model.Allowed
+            };
+        }
+            
+        public static Profile ToModel(this ProfileResource resource)
+        {
+            if (resource == null) return null;
+
+            return new Profile
+            {
+                Id = resource.Id,
+
+                Name = resource.Name,
+                Cutoff = (Quality)resource.Cutoff.Id,
+                Items = resource.Items.ConvertAll(ToModel),
+                Language = resource.Language
+            };
+        }
+
+        public static ProfileQualityItem ToModel(this ProfileQualityItemResource resource)
+        {
+            if (resource == null) return null;
+
+            return new ProfileQualityItem
+            {
+                Quality = (Quality)resource.Quality.Id,
+                Allowed = resource.Allowed
+            };
+        }
+
+        public static List<ProfileResource> ToResource(this IEnumerable<Profile> models)
+        {
+            return models.Select(ToResource).ToList();
+        }
+    }
 }