Fixed: Significantly improved api performance.

src/NzbDrone.Api/RemotePathMappings/RemotePathMappingResource.cs

@@ -1,5 +1,8 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using NzbDrone.Api.REST;
+using NzbDrone.Core.RemotePathMappings;
 
 namespace NzbDrone.Api.RemotePathMappings
 {
@@ -9,4 +12,40 @@ namespace NzbDrone.Api.RemotePathMappings
         public string RemotePath { get; set; }
         public string LocalPath { get; set; }
     }
+
+    public static class RemotePathMappingResourceMapper
+    {
+        public static RemotePathMappingResource ToResource(this RemotePathMapping model)
+        {
+            if (model == null) return null;
+
+            return new RemotePathMappingResource
+            {
+                Id = model.Id,
+
+                Host = model.Host,
+                RemotePath = model.RemotePath,
+                LocalPath = model.LocalPath
+            };
+        }
+
+        public static RemotePathMapping ToModel(this RemotePathMappingResource resource)
+        {
+            if (resource == null) return null;
+
+            return new RemotePathMapping
+            {
+                Id = resource.Id,
+
+                Host = resource.Host,
+                RemotePath = resource.RemotePath,
+                LocalPath = resource.LocalPath
+            };
+        }
+
+        public static List<RemotePathMappingResource> ToResource(this IEnumerable<RemotePathMapping> models)
+        {
+            return models.Select(ToResource).ToList();
+        }
+    }
 }