Reduce the amount of allocations in GetWhereClauses (#10114)

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Bond-009 2023-08-21 18:38:32 +02:00 committed by GitHub
parent d3f8874a3e
commit 84643e328d
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2 changed files with 163 additions and 235 deletions

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@ -26,7 +26,6 @@ using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Extensions;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.LiveTv;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Controller.Playlists;
@ -1305,88 +1304,27 @@ namespace Emby.Server.Implementations.Data
{
if (_config.Configuration.SkipDeserializationForBasicTypes)
{
if (type == typeof(Channel))
{
return false;
}
if (type == typeof(UserRootFolder))
if (type == typeof(Channel)
|| type == typeof(UserRootFolder))
{
return false;
}
}
if (type == typeof(Season))
{
return false;
}
if (type == typeof(MusicArtist))
{
return false;
}
if (type == typeof(Person))
{
return false;
}
if (type == typeof(MusicGenre))
{
return false;
}
if (type == typeof(Genre))
{
return false;
}
if (type == typeof(Studio))
{
return false;
}
if (type == typeof(PlaylistsFolder))
{
return false;
}
if (type == typeof(PhotoAlbum))
{
return false;
}
if (type == typeof(Year))
{
return false;
}
if (type == typeof(Book))
{
return false;
}
if (type == typeof(LiveTvProgram))
{
return false;
}
if (type == typeof(AudioBook))
{
return false;
}
if (type == typeof(Audio))
{
return false;
}
if (type == typeof(MusicAlbum))
{
return false;
}
return true;
return type != typeof(Season)
&& type != typeof(MusicArtist)
&& type != typeof(Person)
&& type != typeof(MusicGenre)
&& type != typeof(Genre)
&& type != typeof(Studio)
&& type != typeof(PlaylistsFolder)
&& type != typeof(PhotoAlbum)
&& type != typeof(Year)
&& type != typeof(Book)
&& type != typeof(LiveTvProgram)
&& type != typeof(AudioBook)
&& type != typeof(Audio)
&& type != typeof(MusicAlbum);
}
private BaseItem GetItem(IReadOnlyList<ResultSetValue> reader, InternalItemsQuery query)
@ -2105,7 +2043,7 @@ namespace Emby.Server.Implementations.Data
insertText.AppendFormat(CultureInfo.InvariantCulture, "(@ItemId, @ChapterIndex{0}, @StartPositionTicks{0}, @Name{0}, @ImagePath{0}, @ImageDateModified{0}),", i.ToString(CultureInfo.InvariantCulture));
}
insertText.Length -= 1; // Remove last ,
insertText.Length -= 1; // Remove trailing comma
using (var statement = PrepareStatement(db, insertText.ToString()))
{
@ -3604,7 +3542,6 @@ namespace Emby.Server.Implementations.Data
statement?.TryBind(paramName, "%" + trailerTypes[i] + "%");
}
// Remove last " OR "
clauseBuilder.Length -= Or.Length;
clauseBuilder.Append(')');
@ -3652,7 +3589,6 @@ namespace Emby.Server.Implementations.Data
}
}
// Remove last " OR "
clauseBuilder.Length -= Or.Length;
clauseBuilder.Append(')');
@ -3819,215 +3755,219 @@ namespace Emby.Server.Implementations.Data
if (query.ArtistIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var artistId in query.ArtistIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.ArtistIds.Length; i++)
{
var paramName = "@ArtistIds" + index;
clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type<=1))");
statement?.TryBind(paramName, artistId);
index++;
clauseBuilder.Append("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@ArtistIds")
.Append(i)
.Append(") and Type<=1)) OR ");
statement?.TryBind("@ArtistIds" + i, query.ArtistIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.AlbumArtistIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var artistId in query.AlbumArtistIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.AlbumArtistIds.Length; i++)
{
var paramName = "@ArtistIds" + index;
clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=1))");
statement?.TryBind(paramName, artistId);
index++;
clauseBuilder.Append("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@ArtistIds")
.Append(i)
.Append(") and Type=1)) OR ");
statement?.TryBind("@ArtistIds" + i, query.AlbumArtistIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.ContributingArtistIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var artistId in query.ContributingArtistIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.ContributingArtistIds.Length; i++)
{
var paramName = "@ArtistIds" + index;
clauses.Add("((select CleanName from TypedBaseItems where guid=" + paramName + ") in (select CleanValue from ItemValues where ItemId=Guid and Type=0) AND (select CleanName from TypedBaseItems where guid=" + paramName + ") not in (select CleanValue from ItemValues where ItemId=Guid and Type=1))");
statement?.TryBind(paramName, artistId);
index++;
clauseBuilder.Append("((select CleanName from TypedBaseItems where guid=@ArtistIds")
.Append(i)
.Append(") in (select CleanValue from ItemValues where ItemId=Guid and Type=0) AND (select CleanName from TypedBaseItems where guid=@ArtistIds")
.Append(i)
.Append(") not in (select CleanValue from ItemValues where ItemId=Guid and Type=1)) OR ");
statement?.TryBind("@ArtistIds" + i, query.ContributingArtistIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.AlbumIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var albumId in query.AlbumIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.AlbumIds.Length; i++)
{
var paramName = "@AlbumIds" + index;
clauses.Add("Album in (select Name from typedbaseitems where guid=" + paramName + ")");
statement?.TryBind(paramName, albumId);
index++;
clauseBuilder.Append("Album in (select Name from typedbaseitems where guid=@AlbumIds")
.Append(i)
.Append(") OR ");
statement?.TryBind("@AlbumIds" + i, query.AlbumIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.ExcludeArtistIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var artistId in query.ExcludeArtistIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.ExcludeArtistIds.Length; i++)
{
var paramName = "@ExcludeArtistId" + index;
clauses.Add("(guid not in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type<=1))");
statement?.TryBind(paramName, artistId);
index++;
clauseBuilder.Append("(guid not in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@ExcludeArtistId")
.Append(i)
.Append(") and Type<=1)) OR ");
statement?.TryBind("@ExcludeArtistId" + i, query.ExcludeArtistIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.GenreIds.Count > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var genreId in query.GenreIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.GenreIds.Count; i++)
{
var paramName = "@GenreId" + index;
clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=2))");
statement?.TryBind(paramName, genreId);
index++;
clauseBuilder.Append("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@GenreId")
.Append(i)
.Append(") and Type=2)) OR ");
statement?.TryBind("@GenreId" + i, query.GenreIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.Genres.Count > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var item in query.Genres)
clauseBuilder.Append('(');
for (var i = 0; i < query.Genres.Count; i++)
{
clauses.Add("@Genre" + index + " in (select CleanValue from ItemValues where ItemId=Guid and Type=2)");
statement?.TryBind("@Genre" + index, GetCleanValue(item));
index++;
clauseBuilder.Append("@Genre")
.Append(i)
.Append(" in (select CleanValue from ItemValues where ItemId=Guid and Type=2) OR ");
statement?.TryBind("@Genre" + i, GetCleanValue(query.Genres[i]));
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (tags.Count > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var item in tags)
clauseBuilder.Append('(');
for (var i = 0; i < tags.Count; i++)
{
clauses.Add("@Tag" + index + " in (select CleanValue from ItemValues where ItemId=Guid and Type=4)");
statement?.TryBind("@Tag" + index, GetCleanValue(item));
index++;
clauseBuilder.Append("@Tag")
.Append(i)
.Append(" in (select CleanValue from ItemValues where ItemId=Guid and Type=4) OR ");
statement?.TryBind("@Tag" + i, GetCleanValue(tags[i]));
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (excludeTags.Count > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var item in excludeTags)
clauseBuilder.Append('(');
for (var i = 0; i < excludeTags.Count; i++)
{
clauses.Add("@ExcludeTag" + index + " not in (select CleanValue from ItemValues where ItemId=Guid and Type=4)");
statement?.TryBind("@ExcludeTag" + index, GetCleanValue(item));
index++;
clauseBuilder.Append("@ExcludeTag")
.Append(i)
.Append(" not in (select CleanValue from ItemValues where ItemId=Guid and Type=4) OR ");
statement?.TryBind("@ExcludeTag" + i, GetCleanValue(excludeTags[i]));
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.StudioIds.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var studioId in query.StudioIds)
clauseBuilder.Append('(');
for (var i = 0; i < query.StudioIds.Length; i++)
{
var paramName = "@StudioId" + index;
clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=3))");
statement?.TryBind(paramName, studioId);
index++;
clauseBuilder.Append("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@StudioId")
.Append(i)
.Append(") and Type=3)) OR ");
statement?.TryBind("@StudioId" + i, query.StudioIds[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.OfficialRatings.Length > 0)
{
var clauses = new List<string>();
var index = 0;
foreach (var item in query.OfficialRatings)
clauseBuilder.Append('(');
for (var i = 0; i < query.OfficialRatings.Length; i++)
{
clauses.Add("OfficialRating=@OfficialRating" + index);
statement?.TryBind("@OfficialRating" + index, item);
index++;
clauseBuilder.Append("OfficialRating=@OfficialRating").Append(i).Append(Or);
statement?.TryBind("@OfficialRating" + i, query.OfficialRatings[i]);
}
var clause = "(" + string.Join(" OR ", clauses) + ")";
whereClauses.Add(clause);
clauseBuilder.Length -= Or.Length;
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
var ratingClauseBuilder = new StringBuilder("(");
clauseBuilder.Append('(');
if (query.HasParentalRating ?? false)
{
ratingClauseBuilder.Append("InheritedParentalRatingValue not null");
clauseBuilder.Append("InheritedParentalRatingValue not null");
if (query.MinParentalRating.HasValue)
{
ratingClauseBuilder.Append(" AND InheritedParentalRatingValue >= @MinParentalRating");
clauseBuilder.Append(" AND InheritedParentalRatingValue >= @MinParentalRating");
statement?.TryBind("@MinParentalRating", query.MinParentalRating.Value);
}
if (query.MaxParentalRating.HasValue)
{
ratingClauseBuilder.Append(" AND InheritedParentalRatingValue <= @MaxParentalRating");
clauseBuilder.Append(" AND InheritedParentalRatingValue <= @MaxParentalRating");
statement?.TryBind("@MaxParentalRating", query.MaxParentalRating.Value);
}
}
else if (query.BlockUnratedItems.Length > 0)
{
var paramName = "@UnratedType";
var index = 0;
string blockedUnratedItems = string.Join(',', query.BlockUnratedItems.Select(_ => paramName + index++));
ratingClauseBuilder.Append("(InheritedParentalRatingValue is null AND UnratedType not in (" + blockedUnratedItems + "))");
const string ParamName = "@UnratedType";
clauseBuilder.Append("(InheritedParentalRatingValue is null AND UnratedType not in (");
if (statement is not null)
for (int i = 0; i < query.BlockUnratedItems.Length; i++)
{
for (var ind = 0; ind < query.BlockUnratedItems.Length; ind++)
{
statement.TryBind(paramName + ind, query.BlockUnratedItems[ind].ToString());
}
clauseBuilder.Append(ParamName).Append(i).Append(',');
statement?.TryBind(ParamName + i, query.BlockUnratedItems[i].ToString());
}
// Remove trailing comma
clauseBuilder.Length--;
clauseBuilder.Append("))");
if (query.MinParentalRating.HasValue || query.MaxParentalRating.HasValue)
{
ratingClauseBuilder.Append(" OR (");
clauseBuilder.Append(" OR (");
}
if (query.MinParentalRating.HasValue)
{
ratingClauseBuilder.Append("InheritedParentalRatingValue >= @MinParentalRating");
clauseBuilder.Append("InheritedParentalRatingValue >= @MinParentalRating");
statement?.TryBind("@MinParentalRating", query.MinParentalRating.Value);
}
@ -4035,50 +3975,50 @@ namespace Emby.Server.Implementations.Data
{
if (query.MinParentalRating.HasValue)
{
ratingClauseBuilder.Append(" AND ");
clauseBuilder.Append(" AND ");
}
ratingClauseBuilder.Append("InheritedParentalRatingValue <= @MaxParentalRating");
clauseBuilder.Append("InheritedParentalRatingValue <= @MaxParentalRating");
statement?.TryBind("@MaxParentalRating", query.MaxParentalRating.Value);
}
if (query.MinParentalRating.HasValue || query.MaxParentalRating.HasValue)
{
ratingClauseBuilder.Append(")");
clauseBuilder.Append(')');
}
if (!(query.MinParentalRating.HasValue || query.MaxParentalRating.HasValue))
{
ratingClauseBuilder.Append(" OR InheritedParentalRatingValue not null");
clauseBuilder.Append(" OR InheritedParentalRatingValue not null");
}
}
else if (query.MinParentalRating.HasValue)
{
ratingClauseBuilder.Append("InheritedParentalRatingValue is null OR (InheritedParentalRatingValue >= @MinParentalRating");
clauseBuilder.Append("InheritedParentalRatingValue is null OR (InheritedParentalRatingValue >= @MinParentalRating");
statement?.TryBind("@MinParentalRating", query.MinParentalRating.Value);
if (query.MaxParentalRating.HasValue)
{
ratingClauseBuilder.Append(" AND InheritedParentalRatingValue <= @MaxParentalRating");
clauseBuilder.Append(" AND InheritedParentalRatingValue <= @MaxParentalRating");
statement?.TryBind("@MaxParentalRating", query.MaxParentalRating.Value);
}
ratingClauseBuilder.Append(")");
clauseBuilder.Append(')');
}
else if (query.MaxParentalRating.HasValue)
{
ratingClauseBuilder.Append("InheritedParentalRatingValue is null OR InheritedParentalRatingValue <= @MaxParentalRating");
clauseBuilder.Append("InheritedParentalRatingValue is null OR InheritedParentalRatingValue <= @MaxParentalRating");
statement?.TryBind("@MaxParentalRating", query.MaxParentalRating.Value);
}
else if (!query.HasParentalRating ?? false)
{
ratingClauseBuilder.Append("InheritedParentalRatingValue is null");
clauseBuilder.Append("InheritedParentalRatingValue is null");
}
var ratingClauseString = ratingClauseBuilder.ToString();
if (!string.Equals(ratingClauseString, "(", StringComparison.OrdinalIgnoreCase))
if (clauseBuilder.Length > 1)
{
whereClauses.Add(ratingClauseString + ")");
whereClauses.Add(clauseBuilder.Append(')').ToString());
clauseBuilder.Length = 0;
}
if (query.HasOfficialRating.HasValue)
@ -4565,7 +4505,6 @@ namespace Emby.Server.Implementations.Data
return whereClauses;
}
#nullable disable
/// <summary>
/// Formats a where clause for the specified provider.
@ -4582,6 +4521,7 @@ namespace Emby.Server.Implementations.Data
provider);
}
#nullable disable
private List<string> GetItemByNameTypesInQuery(InternalItemsQuery query)
{
var list = new List<string>();
@ -4661,24 +4601,17 @@ namespace Emby.Server.Implementations.Data
return true;
}
if (query.IncludeItemTypes.Contains(BaseItemKind.Episode)
return query.IncludeItemTypes.Contains(BaseItemKind.Episode)
|| query.IncludeItemTypes.Contains(BaseItemKind.Video)
|| query.IncludeItemTypes.Contains(BaseItemKind.Movie)
|| query.IncludeItemTypes.Contains(BaseItemKind.MusicVideo)
|| query.IncludeItemTypes.Contains(BaseItemKind.Series)
|| query.IncludeItemTypes.Contains(BaseItemKind.Season))
{
return true;
}
return false;
|| query.IncludeItemTypes.Contains(BaseItemKind.Season);
}
public void UpdateInheritedValues()
{
string sql = string.Join(
';',
new string[]
var queries = new string[]
{
"delete from ItemValues where type = 6",
@ -4688,16 +4621,11 @@ namespace Emby.Server.Implementations.Data
FROM AncestorIds
LEFT JOIN ItemValues ON (AncestorIds.AncestorId = ItemValues.ItemId)
where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type = 4 "
});
};
using (var connection = GetConnection())
{
connection.RunInTransaction(
db =>
{
connection.ExecuteAll(sql);
},
TransactionMode);
connection.RunQueries(queries);
}
}
@ -4794,25 +4722,25 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
CheckDisposed();
var commandText = "select ItemId, Name, Role, PersonType, SortOrder from People p";
StringBuilder commandText = new StringBuilder("select ItemId, Name, Role, PersonType, SortOrder from People p");
var whereClauses = GetPeopleWhereClauses(query, null);
if (whereClauses.Count != 0)
{
commandText += " where " + string.Join(" AND ", whereClauses);
commandText.Append(" where ").AppendJoin(" AND ", whereClauses);
}
commandText += " order by ListOrder";
commandText.Append(" order by ListOrder");
if (query.Limit > 0)
{
commandText += " LIMIT " + query.Limit;
commandText.Append(" LIMIT ").Append(query.Limit);
}
var list = new List<PersonInfo>();
using (var connection = GetConnection(true))
using (var statement = PrepareStatement(connection, commandText))
using (var statement = PrepareStatement(connection, commandText.ToString()))
{
// Run this again to bind the params
GetPeopleWhereClauses(query, statement);
@ -4930,7 +4858,7 @@ AND Type = @InternalPersonType)");
i.ToString(CultureInfo.InvariantCulture));
}
// Remove last ,
// Remove trailing comma
insertText.Length--;
using (var statement = PrepareStatement(db, insertText.ToString()))
@ -5458,7 +5386,7 @@ AND Type = @InternalPersonType)");
i);
}
// Remove last comma
// Remove trailing comma
insertText.Length--;
using (var statement = PrepareStatement(db, insertText.ToString()))
@ -5539,7 +5467,7 @@ AND Type = @InternalPersonType)");
i.ToString(CultureInfo.InvariantCulture));
}
// Remove last comma
// Remove trailing comma
insertText.Length--;
using (var statement = PrepareStatement(db, insertText.ToString()))
@ -5788,11 +5716,10 @@ AND Type = @InternalPersonType)");
{
var item = new MediaStream
{
Index = reader[1].ToInt()
Index = reader[1].ToInt(),
Type = Enum.Parse<MediaStreamType>(reader[2].ToString(), true)
};
item.Type = Enum.Parse<MediaStreamType>(reader[2].ToString(), true);
if (reader.TryGetString(3, out var codec))
{
item.Codec = codec;
@ -6012,7 +5939,7 @@ AND Type = @InternalPersonType)");
using (var connection = GetConnection(true))
using (var statement = PrepareStatement(connection, cmdText))
{
statement.TryBind("@ItemId", query.ItemId.ToByteArray());
statement.TryBind("@ItemId", query.ItemId);
if (query.Index.HasValue)
{
@ -6073,14 +6000,13 @@ AND Type = @InternalPersonType)");
for (var i = startIndex; i < endIndex; i++)
{
var index = i.ToString(CultureInfo.InvariantCulture);
insertText.Append("(@ItemId, ");
foreach (var column in _mediaAttachmentSaveColumns.Skip(1))
{
insertText.Append('@')
.Append(column)
.Append(index)
.Append(i)
.Append(',');
}

View File

@ -89,6 +89,8 @@
<Rule Id="CA1727" Action="Error" />
<!-- error on CA1813: Avoid unsealed attributes -->
<Rule Id="CA1813" Action="Error" />
<!-- error on CA1834: Use 'StringBuilder.Append(char)' instead of 'StringBuilder.Append(string)' when the input is a constant unit string -->
<Rule Id="CA1834" Action="Error" />
<!-- error on CA1843: Do not use 'WaitAll' with a single task -->
<Rule Id="CA1843" Action="Error" />
<!-- error on CA1845: Use span-based 'string.Concat' -->