From 608cba817c54df60959079719bafca4d7d54269a Mon Sep 17 00:00:00 2001 From: cvium Date: Fri, 30 Apr 2021 15:09:36 +0200 Subject: Reduce some allocations with the magic of spans etc. --- .../Extensions/SplitLinesStringExtensions.cs | 102 +++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs (limited to 'MediaBrowser.Common/Extensions') diff --git a/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs b/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs new file mode 100644 index 0000000000..5332aba9ff --- /dev/null +++ b/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs @@ -0,0 +1,102 @@ +/* +MIT License + +Copyright (c) 2019 Gérald Barré + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + */ +#nullable enable +#pragma warning disable CS1591 +#pragma warning disable CA1034 +using System; +using System.Diagnostics.Contracts; +using System.Runtime.InteropServices; + +namespace MediaBrowser.Common.Extensions +{ + /// + /// Extension class for splitting lines without unnecessary allocations. + /// + public static class SplitLinesStringExtensions + { + /// + /// Creates a new line split enumerator. + /// + /// The string to split. + /// The separator to split on. + /// The enumerator struct. + [Pure] + public static LineSplitEnumerator SpanSplit(this string str, char separator) => new (str.AsSpan(), separator); + + /// + /// Creates a new line split enumerator. + /// + /// The span to split. + /// The separator to split on. + /// The enumerator struct. + [Pure] + public static LineSplitEnumerator Split(this ReadOnlySpan str, char separator) => new (str, separator); + + [StructLayout(LayoutKind.Auto)] + public ref struct LineSplitEnumerator + { + private readonly char _separator; + private ReadOnlySpan _str; + + public LineSplitEnumerator(ReadOnlySpan str, char separator) + { + _str = str; + _separator = separator; + Current = default; + } + + public ReadOnlySpan Current { get; private set; } + + public readonly LineSplitEnumerator GetEnumerator() => this; + + public bool MoveNext() + { + if (_str.Length == 0) + { + return false; + } + + var span = _str; + var index = span.IndexOf(_separator); + if (index == -1) + { + _str = ReadOnlySpan.Empty; + Current = span; + return true; + } + + if (index < span.Length - 1 && span[index] == _separator) + { + Current = span.Slice(0, index); + _str = span[(index + 1)..]; + return true; + } + + Current = span.Slice(0, index); + _str = span[(index + 1)..]; + return true; + } + } + } +} -- cgit v1.2.3 From c0feb3694b86ccc242a637468070daff9120e631 Mon Sep 17 00:00:00 2001 From: cvium Date: Mon, 3 May 2021 23:51:45 +0200 Subject: rename to SplitEnumerator and fix test --- .../Data/SqliteItemRepository.cs | 14 ++- .../Extensions/SplitLinesStringExtensions.cs | 102 --------------------- .../Extensions/SplitStringExtensions.cs | 102 +++++++++++++++++++++ .../Data/SqliteItemRepositoryTests.cs | 31 ++++++- 4 files changed, 137 insertions(+), 112 deletions(-) delete mode 100644 MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs create mode 100644 MediaBrowser.Common/Extensions/SplitStringExtensions.cs (limited to 'MediaBrowser.Common/Extensions') diff --git a/Emby.Server.Implementations/Data/SqliteItemRepository.cs b/Emby.Server.Implementations/Data/SqliteItemRepository.cs index 292ff48faa..4b9b0bed08 100644 --- a/Emby.Server.Implementations/Data/SqliteItemRepository.cs +++ b/Emby.Server.Implementations/Data/SqliteItemRepository.cs @@ -1082,7 +1082,7 @@ namespace Emby.Server.Implementations.Data } } - private ItemImageInfo ItemImageInfoFromValueString(ReadOnlySpan value) + internal ItemImageInfo ItemImageInfoFromValueString(ReadOnlySpan value) { var nextSegment = value.IndexOf('*'); if (nextSegment == -1) @@ -1103,7 +1103,7 @@ namespace Emby.Server.Implementations.Data nextSegment = value.IndexOf('*'); if (nextSegment == -1) { - return null; + nextSegment = value.Length; } ReadOnlySpan imageType = value[..nextSegment]; @@ -1128,13 +1128,18 @@ namespace Emby.Server.Implementations.Data { value = value[(nextSegment + 1)..]; nextSegment = value.IndexOf('*'); + if (nextSegment == -1 || nextSegment == value.Length) + { + return image; + } + ReadOnlySpan widthSpan = value[..nextSegment]; value = value[(nextSegment + 1)..]; nextSegment = value.IndexOf('*'); if (nextSegment == -1) { - return image; + nextSegment = value.Length; } ReadOnlySpan heightSpan = value[..nextSegment]; @@ -1146,10 +1151,9 @@ namespace Emby.Server.Implementations.Data image.Height = height; } - nextSegment += 1; if (nextSegment < value.Length - 1) { - value = value[nextSegment..]; + value = value[(nextSegment + 1)..]; var length = value.Length; Span blurHashSpan = stackalloc char[length]; diff --git a/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs b/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs deleted file mode 100644 index 5332aba9ff..0000000000 --- a/MediaBrowser.Common/Extensions/SplitLinesStringExtensions.cs +++ /dev/null @@ -1,102 +0,0 @@ -/* -MIT License - -Copyright (c) 2019 Gérald Barré - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. - */ -#nullable enable -#pragma warning disable CS1591 -#pragma warning disable CA1034 -using System; -using System.Diagnostics.Contracts; -using System.Runtime.InteropServices; - -namespace MediaBrowser.Common.Extensions -{ - /// - /// Extension class for splitting lines without unnecessary allocations. - /// - public static class SplitLinesStringExtensions - { - /// - /// Creates a new line split enumerator. - /// - /// The string to split. - /// The separator to split on. - /// The enumerator struct. - [Pure] - public static LineSplitEnumerator SpanSplit(this string str, char separator) => new (str.AsSpan(), separator); - - /// - /// Creates a new line split enumerator. - /// - /// The span to split. - /// The separator to split on. - /// The enumerator struct. - [Pure] - public static LineSplitEnumerator Split(this ReadOnlySpan str, char separator) => new (str, separator); - - [StructLayout(LayoutKind.Auto)] - public ref struct LineSplitEnumerator - { - private readonly char _separator; - private ReadOnlySpan _str; - - public LineSplitEnumerator(ReadOnlySpan str, char separator) - { - _str = str; - _separator = separator; - Current = default; - } - - public ReadOnlySpan Current { get; private set; } - - public readonly LineSplitEnumerator GetEnumerator() => this; - - public bool MoveNext() - { - if (_str.Length == 0) - { - return false; - } - - var span = _str; - var index = span.IndexOf(_separator); - if (index == -1) - { - _str = ReadOnlySpan.Empty; - Current = span; - return true; - } - - if (index < span.Length - 1 && span[index] == _separator) - { - Current = span.Slice(0, index); - _str = span[(index + 1)..]; - return true; - } - - Current = span.Slice(0, index); - _str = span[(index + 1)..]; - return true; - } - } - } -} diff --git a/MediaBrowser.Common/Extensions/SplitStringExtensions.cs b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs new file mode 100644 index 0000000000..6c1c45013d --- /dev/null +++ b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs @@ -0,0 +1,102 @@ +/* +MIT License + +Copyright (c) 2019 Gérald Barré + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + */ +#nullable enable +#pragma warning disable CS1591 +#pragma warning disable CA1034 +using System; +using System.Diagnostics.Contracts; +using System.Runtime.InteropServices; + +namespace MediaBrowser.Common.Extensions +{ + /// + /// Extension class for splitting lines without unnecessary allocations. + /// + public static class SplitStringExtensions + { + /// + /// Creates a new string split enumerator. + /// + /// The string to split. + /// The separator to split on. + /// The enumerator struct. + [Pure] + public static SplitEnumerator SpanSplit(this string str, char separator) => new (str.AsSpan(), separator); + + /// + /// Creates a new span split enumerator. + /// + /// The span to split. + /// The separator to split on. + /// The enumerator struct. + [Pure] + public static SplitEnumerator Split(this ReadOnlySpan str, char separator) => new (str, separator); + + [StructLayout(LayoutKind.Auto)] + public ref struct SplitEnumerator + { + private readonly char _separator; + private ReadOnlySpan _str; + + public SplitEnumerator(ReadOnlySpan str, char separator) + { + _str = str; + _separator = separator; + Current = default; + } + + public ReadOnlySpan Current { get; private set; } + + public readonly SplitEnumerator GetEnumerator() => this; + + public bool MoveNext() + { + if (_str.Length == 0) + { + return false; + } + + var span = _str; + var index = span.IndexOf(_separator); + if (index == -1) + { + _str = ReadOnlySpan.Empty; + Current = span; + return true; + } + + if (index < span.Length - 1 && span[index] == _separator) + { + Current = span.Slice(0, index); + _str = span[(index + 1)..]; + return true; + } + + Current = span.Slice(0, index); + _str = span[(index + 1)..]; + return true; + } + } + } +} diff --git a/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs index af6ec32458..c0f34afa76 100644 --- a/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs +++ b/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs @@ -37,7 +37,7 @@ namespace Jellyfin.Server.Implementations.Tests.Data yield return new object[] { "/mnt/series/Family Guy/Season 1/Family Guy - S01E01-thumb.jpg*637452096478512963*Primary*1920*1080*WjQbtJtSO8nhNZ%L_Io#R/oaS6o}-;adXAoIn7j[%hW9s:WGw[nN", - new ItemImageInfo() + new ItemImageInfo { Path = "/mnt/series/Family Guy/Season 1/Family Guy - S01E01-thumb.jpg", Type = ImageType.Primary, @@ -51,7 +51,27 @@ namespace Jellyfin.Server.Implementations.Tests.Data yield return new object[] { "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg*0*Primary*0*0", - new ItemImageInfo() + new ItemImageInfo + { + Path = "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg", + Type = ImageType.Primary, + } + }; + + yield return new object[] + { + "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg*0*Primary", + new ItemImageInfo + { + Path = "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg", + Type = ImageType.Primary, + } + }; + + yield return new object[] + { + "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg*0*Primary*600", + new ItemImageInfo { Path = "https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg", Type = ImageType.Primary, @@ -61,7 +81,7 @@ namespace Jellyfin.Server.Implementations.Tests.Data yield return new object[] { "%MetadataPath%/library/68/68578562b96c80a7ebd530848801f645/poster.jpg*637264380567586027*Primary*600*336", - new ItemImageInfo() + new ItemImageInfo { Path = "/meta/data/path/library/68/68578562b96c80a7ebd530848801f645/poster.jpg", Type = ImageType.Primary, @@ -76,7 +96,7 @@ namespace Jellyfin.Server.Implementations.Tests.Data [MemberData(nameof(ItemImageInfoFromValueString_Valid_TestData))] public void ItemImageInfoFromValueString_Valid_Success(string value, ItemImageInfo expected) { - var result = _sqliteItemRepository.ItemImageInfoFromValueString(value); + var result = _sqliteItemRepository.ItemImageInfoFromValueString(value.AsSpan()); Assert.Equal(expected.Path, result.Path); Assert.Equal(expected.Type, result.Type); Assert.Equal(expected.DateModified, result.DateModified); @@ -88,9 +108,10 @@ namespace Jellyfin.Server.Implementations.Tests.Data [Theory] [InlineData("")] [InlineData("*")] + [InlineData("https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg*0")] public void ItemImageInfoFromValueString_Invalid_Null(string value) { - Assert.Null(_sqliteItemRepository.ItemImageInfoFromValueString(value)); + Assert.Null(_sqliteItemRepository.ItemImageInfoFromValueString(value.AsSpan())); } public static IEnumerable DeserializeImages_Valid_TestData() -- cgit v1.2.3 From ad3e835bcf7e800b483495af74adc36e10139be5 Mon Sep 17 00:00:00 2001 From: cvium Date: Tue, 4 May 2021 19:57:03 +0200 Subject: remove redundant code --- MediaBrowser.Common/Extensions/SplitStringExtensions.cs | 7 ------- .../Data/SqliteItemRepositoryTests.cs | 4 ++-- 2 files changed, 2 insertions(+), 9 deletions(-) (limited to 'MediaBrowser.Common/Extensions') diff --git a/MediaBrowser.Common/Extensions/SplitStringExtensions.cs b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs index 6c1c45013d..e78fa78d6a 100644 --- a/MediaBrowser.Common/Extensions/SplitStringExtensions.cs +++ b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs @@ -86,13 +86,6 @@ namespace MediaBrowser.Common.Extensions return true; } - if (index < span.Length - 1 && span[index] == _separator) - { - Current = span.Slice(0, index); - _str = span[(index + 1)..]; - return true; - } - Current = span.Slice(0, index); _str = span[(index + 1)..]; return true; diff --git a/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs index c0f34afa76..71f8c51818 100644 --- a/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs +++ b/tests/Jellyfin.Server.Implementations.Tests/Data/SqliteItemRepositoryTests.cs @@ -96,7 +96,7 @@ namespace Jellyfin.Server.Implementations.Tests.Data [MemberData(nameof(ItemImageInfoFromValueString_Valid_TestData))] public void ItemImageInfoFromValueString_Valid_Success(string value, ItemImageInfo expected) { - var result = _sqliteItemRepository.ItemImageInfoFromValueString(value.AsSpan()); + var result = _sqliteItemRepository.ItemImageInfoFromValueString(value); Assert.Equal(expected.Path, result.Path); Assert.Equal(expected.Type, result.Type); Assert.Equal(expected.DateModified, result.DateModified); @@ -111,7 +111,7 @@ namespace Jellyfin.Server.Implementations.Tests.Data [InlineData("https://image.tmdb.org/t/p/original/zhB5CHEgqqh4wnEqDNJLfWXJlcL.jpg*0")] public void ItemImageInfoFromValueString_Invalid_Null(string value) { - Assert.Null(_sqliteItemRepository.ItemImageInfoFromValueString(value.AsSpan())); + Assert.Null(_sqliteItemRepository.ItemImageInfoFromValueString(value)); } public static IEnumerable DeserializeImages_Valid_TestData() -- cgit v1.2.3