Merge pull request #848 from Bond-009/perf

Minor changes to reduce allocations

9 files changed, 42 insertions, 33 deletions

diff --git a/MediaBrowser.Api/BaseApiService.cs b/MediaBrowser.Api/BaseApiService.cs
index 451ee72dd..a037357ed 100644
--- a/MediaBrowser.Api/BaseApiService.cs
+++ b/MediaBrowser.Api/BaseApiService.cs
@@ -9,6 +9,7 @@ using MediaBrowser.Controller.Net;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Services;
+using MediaBrowser.Model.Querying;
 using Microsoft.Extensions.Logging;
 
 namespace MediaBrowser.Api
@@ -118,8 +119,7 @@ namespace MediaBrowser.Api
         {
             var options = new DtoOptions();
 
-            var hasFields = request as IHasItemFields;
-            if (hasFields != null)
+            if (request is IHasItemFields hasFields)
             {
                 options.Fields = hasFields.GetItemFields();
             }
@@ -133,9 +133,11 @@ namespace MediaBrowser.Api
                     client.IndexOf("media center", StringComparison.OrdinalIgnoreCase) != -1 ||
                     client.IndexOf("classic", StringComparison.OrdinalIgnoreCase) != -1)
                 {
-                    var list = options.Fields.ToList();
-                    list.Add(Model.Querying.ItemFields.RecursiveItemCount);
-                    options.Fields = list.ToArray();
+                    int oldLen = options.Fields.Length;
+                    var arr = new ItemFields[oldLen + 1];
+                    options.Fields.CopyTo(arr, 0);
+                    arr[oldLen] = Model.Querying.ItemFields.RecursiveItemCount;
+                    options.Fields = arr;
                 }
 
                 if (client.IndexOf("kodi", StringComparison.OrdinalIgnoreCase) != -1 ||
@@ -146,9 +148,12 @@ namespace MediaBrowser.Api
                    client.IndexOf("samsung", StringComparison.OrdinalIgnoreCase) != -1 ||
                    client.IndexOf("androidtv", StringComparison.OrdinalIgnoreCase) != -1)
                 {
-                    var list = options.Fields.ToList();
-                    list.Add(Model.Querying.ItemFields.ChildCount);
-                    options.Fields = list.ToArray();
+
+                    int oldLen = options.Fields.Length;
+                    var arr = new ItemFields[oldLen + 1];
+                    options.Fields.CopyTo(arr, 0);
+                    arr[oldLen] = Model.Querying.ItemFields.ChildCount;
+                    options.Fields = arr;
                 }
             }
 
@@ -167,7 +172,16 @@ namespace MediaBrowser.Api
 
                 if (!string.IsNullOrWhiteSpace(hasDtoOptions.EnableImageTypes))
                 {
-                    options.ImageTypes = (hasDtoOptions.EnableImageTypes ?? string.Empty).Split(',').Where(i => !string.IsNullOrWhiteSpace(i)).Select(v => (ImageType)Enum.Parse(typeof(ImageType), v, true)).ToArray();
+                    if (string.IsNullOrEmpty(hasDtoOptions.EnableImageTypes))
+                    {
+                        options.ImageTypes = Array.Empty<ImageType>();
+                    }
+                    else
+                    {
+                        options.ImageTypes = hasDtoOptions.EnableImageTypes.Split(new [] { ',' }, StringSplitOptions.RemoveEmptyEntries)
+                                                                            .Select(v => (ImageType)Enum.Parse(typeof(ImageType), v, true))
+                                                                            .ToArray();
+                    }
                 }
             }
 
diff --git a/MediaBrowser.Api/UserLibrary/ArtistsService.cs b/MediaBrowser.Api/UserLibrary/ArtistsService.cs
index 651da1939..7a8455ff2 100644
--- a/MediaBrowser.Api/UserLibrary/ArtistsService.cs
+++ b/MediaBrowser.Api/UserLibrary/ArtistsService.cs
@@ -112,7 +112,7 @@ namespace MediaBrowser.Api.UserLibrary
             return ToOptimizedResult(result);
         }
 
-        protected override QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected override QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
             if (request is GetAlbumArtists)
             {
diff --git a/MediaBrowser.Api/UserLibrary/BaseItemsByNameService.cs b/MediaBrowser.Api/UserLibrary/BaseItemsByNameService.cs
index 471b41127..e3c9ae58e 100644
--- a/MediaBrowser.Api/UserLibrary/BaseItemsByNameService.cs
+++ b/MediaBrowser.Api/UserLibrary/BaseItemsByNameService.cs
@@ -209,9 +209,9 @@ namespace MediaBrowser.Api.UserLibrary
             };
         }
 
-        protected virtual QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected virtual QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
-            return new QueryResult<Tuple<BaseItem, ItemCounts>>();
+            return new QueryResult<(BaseItem, ItemCounts)>();
         }
 
         private void SetItemCounts(BaseItemDto dto, ItemCounts counts)
diff --git a/MediaBrowser.Api/UserLibrary/BaseItemsRequest.cs b/MediaBrowser.Api/UserLibrary/BaseItemsRequest.cs
index 7af50c329..a26f59573 100644
--- a/MediaBrowser.Api/UserLibrary/BaseItemsRequest.cs
+++ b/MediaBrowser.Api/UserLibrary/BaseItemsRequest.cs
@@ -396,14 +396,12 @@ namespace MediaBrowser.Api.UserLibrary
 
         public VideoType[] GetVideoTypes()
         {
-            var val = VideoTypes;
-
-            if (string.IsNullOrEmpty(val))
+            if (string.IsNullOrEmpty(VideoTypes))
             {
-                return new VideoType[] { };
+                return Array.Empty<VideoType>();
             }
 
-            return val.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).Select(v => (VideoType)Enum.Parse(typeof(VideoType), v, true)).ToArray();
+            return VideoTypes.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).Select(v => (VideoType)Enum.Parse(typeof(VideoType), v, true)).ToArray();
         }
 
         /// <summary>
diff --git a/MediaBrowser.Api/UserLibrary/GenresService.cs b/MediaBrowser.Api/UserLibrary/GenresService.cs
index baf570d50..0c04d02dd 100644
--- a/MediaBrowser.Api/UserLibrary/GenresService.cs
+++ b/MediaBrowser.Api/UserLibrary/GenresService.cs
@@ -92,7 +92,7 @@ namespace MediaBrowser.Api.UserLibrary
             return ToOptimizedResult(result);
         }
 
-        protected override QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected override QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
             var viewType = GetParentItemViewType(request);
 
diff --git a/MediaBrowser.Api/UserLibrary/ItemsService.cs b/MediaBrowser.Api/UserLibrary/ItemsService.cs
index 3ae7da007..96b0aa003 100644
--- a/MediaBrowser.Api/UserLibrary/ItemsService.cs
+++ b/MediaBrowser.Api/UserLibrary/ItemsService.cs
@@ -90,7 +90,7 @@ namespace MediaBrowser.Api.UserLibrary
 
             var options = GetDtoOptions(_authContext, request);
 
-            var ancestorIds = new List<Guid>();
+            var ancestorIds = Array.Empty<Guid>();
 
             var excludeFolderIds = user.Configuration.LatestItemsExcludes;
             if (parentIdGuid.Equals(Guid.Empty) && excludeFolderIds.Length > 0)
@@ -99,12 +99,12 @@ namespace MediaBrowser.Api.UserLibrary
                     .Where(i => i is Folder)
                     .Where(i => !excludeFolderIds.Contains(i.Id.ToString("N")))
                     .Select(i => i.Id)
-                    .ToList();
+                    .ToArray();
             }
 
             var itemsResult = _libraryManager.GetItemsResult(new InternalItemsQuery(user)
             {
-                OrderBy = new[] { ItemSortBy.DatePlayed }.Select(i => new ValueTuple<string, SortOrder>(i, SortOrder.Descending)).ToArray(),
+                OrderBy = new[] { (ItemSortBy.DatePlayed, SortOrder.Descending) },
                 IsResumable = true,
                 StartIndex = request.StartIndex,
                 Limit = request.Limit,
@@ -115,7 +115,7 @@ namespace MediaBrowser.Api.UserLibrary
                 IsVirtualItem = false,
                 CollapseBoxSetItems = false,
                 EnableTotalRecordCount = request.EnableTotalRecordCount,
-                AncestorIds = ancestorIds.ToArray(),
+                AncestorIds = ancestorIds,
                 IncludeItemTypes = request.GetIncludeItemTypes(),
                 ExcludeItemTypes = request.GetExcludeItemTypes(),
                 SearchTerm = request.SearchTerm
@@ -155,7 +155,7 @@ namespace MediaBrowser.Api.UserLibrary
         /// <param name="request">The request.</param>
         private QueryResult<BaseItemDto> GetItems(GetItems request)
         {
-            var user = !request.UserId.Equals(Guid.Empty) ? _userManager.GetUserById(request.UserId) : null;
+            var user = request.UserId == Guid.Empty ? null : _userManager.GetUserById(request.UserId);
 
             var dtoOptions = GetDtoOptions(_authContext, request);
 
@@ -190,11 +190,8 @@ namespace MediaBrowser.Api.UserLibrary
         /// </summary>
         private QueryResult<BaseItem> GetQueryResult(GetItems request, DtoOptions dtoOptions, User user)
         {
-            if (string.Equals(request.IncludeItemTypes, "Playlist", StringComparison.OrdinalIgnoreCase))
-            {
-                request.ParentId = null;
-            }
-            else if (string.Equals(request.IncludeItemTypes, "BoxSet", StringComparison.OrdinalIgnoreCase))
+            if (string.Equals(request.IncludeItemTypes, "Playlist", StringComparison.OrdinalIgnoreCase)
+                || string.Equals(request.IncludeItemTypes, "BoxSet", StringComparison.OrdinalIgnoreCase))
             {
                 request.ParentId = null;
             }
diff --git a/MediaBrowser.Api/UserLibrary/MusicGenresService.cs b/MediaBrowser.Api/UserLibrary/MusicGenresService.cs
index 4fcc3aa53..94f5262b0 100644
--- a/MediaBrowser.Api/UserLibrary/MusicGenresService.cs
+++ b/MediaBrowser.Api/UserLibrary/MusicGenresService.cs
@@ -83,7 +83,7 @@ namespace MediaBrowser.Api.UserLibrary
             return ToOptimizedResult(result);
         }
 
-        protected override QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected override QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
             return LibraryManager.GetMusicGenres(query);
         }
diff --git a/MediaBrowser.Api/UserLibrary/PersonsService.cs b/MediaBrowser.Api/UserLibrary/PersonsService.cs
index d317f9f38..c26457778 100644
--- a/MediaBrowser.Api/UserLibrary/PersonsService.cs
+++ b/MediaBrowser.Api/UserLibrary/PersonsService.cs
@@ -101,7 +101,7 @@ namespace MediaBrowser.Api.UserLibrary
             throw new NotImplementedException();
         }
 
-        protected override QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected override QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
             var items = LibraryManager.GetPeopleItems(new InternalPeopleQuery
             {
@@ -109,10 +109,10 @@ namespace MediaBrowser.Api.UserLibrary
                 NameContains = query.NameContains ?? query.SearchTerm
             });
 
-            return new QueryResult<Tuple<BaseItem, ItemCounts>>
+            return new QueryResult<(BaseItem, ItemCounts)>
             {
                 TotalRecordCount = items.Count,
-                Items = items.Take(query.Limit ?? int.MaxValue).Select(i => new Tuple<BaseItem, ItemCounts>(i, new ItemCounts())).ToArray()
+                Items = items.Take(query.Limit ?? int.MaxValue).Select(i => (i as BaseItem, new ItemCounts())).ToArray()
             };
         }
 
diff --git a/MediaBrowser.Api/UserLibrary/StudiosService.cs b/MediaBrowser.Api/UserLibrary/StudiosService.cs
index 4e2483a56..890acc931 100644
--- a/MediaBrowser.Api/UserLibrary/StudiosService.cs
+++ b/MediaBrowser.Api/UserLibrary/StudiosService.cs
@@ -91,7 +91,7 @@ namespace MediaBrowser.Api.UserLibrary
             return ToOptimizedResult(result);
         }
 
-        protected override QueryResult<Tuple<BaseItem, ItemCounts>> GetItems(GetItemsByName request, InternalItemsQuery query)
+        protected override QueryResult<(BaseItem, ItemCounts)> GetItems(GetItemsByName request, InternalItemsQuery query)
         {
             return LibraryManager.GetStudios(query);
         }