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Reduce string allocations by regex

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pull/9337/head
Bond_009 1 year ago
parent df8346cd63
commit 48263078b4
11 changed files with 22 additions and 62 deletions
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4
Emby.Naming/AudioBook/AudioBookFilePathParser.cs
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@ -40,7 +40,7 @@ namespace Emby.Naming.AudioBook
var value = match.Groups["chapter"];
if (value.Success)
{
if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
if (int.TryParse(value.ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
{
result.ChapterNumber = intValue;
}
@ -52,7 +52,7 @@ namespace Emby.Naming.AudioBook
var value = match.Groups["part"];
if (value.Success)
{
if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
if (int.TryParse(value.ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
{
result.PartNumber = intValue;
}

2
Emby.Naming/AudioBook/AudioBookNameParser.cs
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@ -47,7 +47,7 @@ namespace Emby.Naming.AudioBook
var value = match.Groups["year"];
if (value.Success)
{
if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
if (int.TryParse(value.ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
{
result.Year = intValue;
}

32
Emby.Naming/Common/NamingOptions.cs
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@ -453,16 +453,6 @@ namespace Emby.Naming.Common
},
};
EpisodeWithoutSeasonExpressions = new[]
{
@"[/\._ \-]()([0-9]+)(-[0-9]+)?"
};
EpisodeMultiPartExpressions = new[]
{
@"^[-_ex]+([0-9]+(?:(?:[a-i]|\\.[1-9])(?![0-9]))?)"
};
VideoExtraRules = new[]
{
new ExtraRule(
@ -797,16 +787,6 @@ namespace Emby.Naming.Common
/// </summary>
public EpisodeExpression[] EpisodeExpressions { get; set; }
/// <summary>
/// Gets or sets list of raw episode without season regular expressions strings.
/// </summary>
public string[] EpisodeWithoutSeasonExpressions { get; set; }
/// <summary>
/// Gets or sets list of raw multi-part episodes regular expressions strings.
/// </summary>
public string[] EpisodeMultiPartExpressions { get; set; }
/// <summary>
/// Gets or sets list of video file extensions.
/// </summary>
@ -877,16 +857,6 @@ namespace Emby.Naming.Common
/// </summary>
public Regex[] CleanStringRegexes { get; private set; } = Array.Empty<Regex>();
/// <summary>
/// Gets list of episode without season regular expressions.
/// </summary>
public Regex[] EpisodeWithoutSeasonRegexes { get; private set; } = Array.Empty<Regex>();
/// <summary>
/// Gets list of multi-part episode regular expressions.
/// </summary>
public Regex[] EpisodeMultiPartRegexes { get; private set; } = Array.Empty<Regex>();
/// <summary>
/// Compiles raw regex strings into regexes.
/// </summary>
@ -894,8 +864,6 @@ namespace Emby.Naming.Common
{
CleanDateTimeRegexes = CleanDateTimes.Select(Compile).ToArray();
CleanStringRegexes = CleanStrings.Select(Compile).ToArray();
EpisodeWithoutSeasonRegexes = EpisodeWithoutSeasonExpressions.Select(Compile).ToArray();
EpisodeMultiPartRegexes = EpisodeMultiPartExpressions.Select(Compile).ToArray();
}
private Regex Compile(string exp)

14
Emby.Naming/TV/EpisodePathParser.cs
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@ -113,7 +113,7 @@ namespace Emby.Naming.TV
if (expression.DateTimeFormats.Length > 0)
{
if (DateTime.TryParseExact(
match.Groups[0].Value,
match.Groups[0].ValueSpan,
expression.DateTimeFormats,
CultureInfo.InvariantCulture,
DateTimeStyles.None,
@ -125,7 +125,7 @@ namespace Emby.Naming.TV
result.Success = true;
}
}
else if (DateTime.TryParse(match.Groups[0].Value, out date))
else if (DateTime.TryParse(match.Groups[0].ValueSpan, out date))
{
result.Year = date.Year;
result.Month = date.Month;
@ -138,12 +138,12 @@ namespace Emby.Naming.TV
}
else if (expression.IsNamed)
{
if (int.TryParse(match.Groups["seasonnumber"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var num))
if (int.TryParse(match.Groups["seasonnumber"].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var num))
{
result.SeasonNumber = num;
}
if (int.TryParse(match.Groups["epnumber"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
if (int.TryParse(match.Groups["epnumber"].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
{
result.EpisodeNumber = num;
}
@ -158,7 +158,7 @@ namespace Emby.Naming.TV
if (nextIndex >= name.Length
|| !"0123456789iIpP".Contains(name[nextIndex], StringComparison.Ordinal))
{
if (int.TryParse(endingNumberGroup.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
if (int.TryParse(endingNumberGroup.ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
{
result.EndingEpisodeNumber = num;
}
@ -170,12 +170,12 @@ namespace Emby.Naming.TV
}
else
{
if (int.TryParse(match.Groups[1].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var num))
if (int.TryParse(match.Groups[1].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var num))
{
result.SeasonNumber = num;
}
if (int.TryParse(match.Groups[2].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
if (int.TryParse(match.Groups[2].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
{
result.EpisodeNumber = num;
}

2
Emby.Naming/Video/CleanDateTimeParser.cs
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@ -43,7 +43,7 @@ namespace Emby.Naming.Video
&& match.Groups.Count == 5
&& match.Groups[1].Success
&& match.Groups[2].Success
&& int.TryParse(match.Groups[2].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var year))
&& int.TryParse(match.Groups[2].ValueSpan, NumberStyles.Integer, CultureInfo.InvariantCulture, out var year))
{
result = new CleanDateTimeResult(match.Groups[1].Value.TrimEnd(), year);
return true;

2
Emby.Naming/Video/ExtraRuleResolver.cs
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@ -56,7 +56,7 @@ namespace Emby.Naming.Video
}
else if (rule.RuleType == ExtraRuleType.Regex)
{
var filename = Path.GetFileName(path);
var filename = Path.GetFileName(path.AsSpan());
var isMatch = Regex.IsMatch(filename, rule.Token, RegexOptions.IgnoreCase | RegexOptions.Compiled);

9
Emby.Naming/Video/VideoListResolver.cs
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@ -176,16 +176,15 @@ namespace Emby.Naming.Video
}
// There are no span overloads for regex unfortunately
var tmpTestFilename = testFilename.ToString();
if (CleanStringParser.TryClean(tmpTestFilename, namingOptions.CleanStringRegexes, out var cleanName))
if (CleanStringParser.TryClean(testFilename.ToString(), namingOptions.CleanStringRegexes, out var cleanName))
{
tmpTestFilename = cleanName.Trim();
testFilename = cleanName.AsSpan().Trim();
}
// The CleanStringParser should have removed common keywords etc.
return string.IsNullOrEmpty(tmpTestFilename)
return testFilename.IsEmpty
|| testFilename[0] == '-'
|| Regex.IsMatch(tmpTestFilename, @"^\[([^]]*)\]", RegexOptions.Compiled);
|| Regex.IsMatch(testFilename, @"^\[([^]]*)\]", RegexOptions.Compiled);
}
}
}

9
Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
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@ -313,13 +313,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
return result;
}
private static bool IsIgnored(string filename)
{
// Ignore samples
Match m = Regex.Match(filename, @"\bsample\b", RegexOptions.IgnoreCase | RegexOptions.Compiled);
return m.Success;
}
private static bool IsIgnored(ReadOnlySpan<char> filename)
=> Regex.IsMatch(filename, @"\bsample\b", RegexOptions.IgnoreCase | RegexOptions.Compiled);
private static bool ContainsFile(IReadOnlyList<VideoInfo> result, FileSystemMetadata file)
{

2
Jellyfin.Server.Implementations/Users/UserManager.cs
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@ -740,7 +740,7 @@ namespace Jellyfin.Server.Implementations.Users
throw new ArgumentException("Usernames can contain unicode symbols, numbers (0-9), dashes (-), underscores (_), apostrophes ('), and periods (.)", nameof(name));
}
private static bool IsValidUsername(string name)
private static bool IsValidUsername(ReadOnlySpan<char> name)
{
// This is some regex that matches only on unicode "word" characters, as well as -, _ and @
// In theory this will cut out most if not all 'control' characters which should help minimize any weirdness

6
MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
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@ -277,7 +277,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
if (match.Success)
{
if (Version.TryParse(match.Groups[1].Value, out var result))
if (Version.TryParse(match.Groups[1].ValueSpan, out var result))
{
return result;
}
@ -327,8 +327,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
RegexOptions.Multiline))
{
var version = new Version(
int.Parse(match.Groups["major"].Value, CultureInfo.InvariantCulture),
int.Parse(match.Groups["minor"].Value, CultureInfo.InvariantCulture));
int.Parse(match.Groups["major"].ValueSpan, CultureInfo.InvariantCulture),
int.Parse(match.Groups["minor"].ValueSpan, CultureInfo.InvariantCulture));
map.Add(match.Groups["name"].Value, version);
}

2
tests/Jellyfin.Naming.Tests/Common/NamingOptionsTest.cs
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@ -12,8 +12,6 @@ namespace Jellyfin.Naming.Tests.Common
Assert.NotEmpty(options.CleanDateTimeRegexes);
Assert.NotEmpty(options.CleanStringRegexes);
Assert.NotEmpty(options.EpisodeWithoutSeasonRegexes);
Assert.NotEmpty(options.EpisodeMultiPartRegexes);
}
[Fact]

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