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Performance code quality

Recipe IDOpenRewrite.Recipes.CSharp.CodeQuality.Performance.PerformanceCodeQuality

ArtifactOpenRewrite.Recipes.CSharp.CodeQuality

Performance optimization recipes for C# code.

Composite recipeOpenRewritecsharpperformancecode-qualityModerne Proprietary License

Try in PlatformTry this recipe in the Moderne platform. Not a user yet? You’ll get a no-setup demo environment, with nothing to install or configure.

Definition

Recipes54

54 recipes

• Avoid boxing of value type
• Use StringComparison
• Avoid locking on publicly accessible instance
• Use StringBuilder.AppendLine
• Use Array.Empty<T>() instead of new T[0]
• Return completed task instead of null
• Use Count/Length property instead of Count()
• Use Regex.IsMatch
• Use string.Concat instead of string.Join
• Bitwise operation on enum without Flags attribute
• Make parameter ref read-only
• Avoid NullReferenceException
• Remove unnecessary explicit enumerator
• Throwing of new NotImplementedException
• Optimize method call
• Do not pass non-read-only struct by read-only reference
• Replace Enum.ToString() with nameof
• Optimize StringBuilder.Append usage
• Find blocking calls in async methods
• Find methods not forwarding CancellationToken
• Find implicit culture-sensitive string methods
• Find implicit culture-sensitive ToString calls
• Find LINQ methods replaceable with direct methods
• Find missing WithCancellation on async enumerables
• Do not use async void
• Do not use NaN in comparisons
• Add timeout to Regex
• Do not use blocking calls on tasks
• Use ContainsKey instead of TryGetValue with discard
• String.Format format string should be constant
• Avoid closure when using ConcurrentDictionary
• Use RegexOptions.ExplicitCapture
• Do not use ToString on GetType result
• Find EqualityComparer<string>.Default usage
• Find string.GetHashCode() without StringComparer
• Use char overload for single-character string methods
• Find Regex that could use source generator
• Find FormattableString that could use string.Create
• Find GetCustomAttributes that could use Attribute.IsDefined
• Find Span<char> equality that should use SequenceEqual
• Find structs without StructLayout attribute
• Find methods that could be static
• Find Guid.Parse with constant string
• Find calls that could use TimeProvider
• Find simplifiable string.Create calls
• Find closure in GetOrAdd that could use factory argument
• Find GetType() called on System.Type
• Find LINQ Count() on materialized collection
• Find unused Stream.Read return value
• Find Dictionary/HashSet with struct key type
• Find LINQ methods replaceable with indexer
• Use ContainsKey instead of Keys.Contains
• Find Values.Contains() instead of ContainsValue()
• Find closure in GetOrAdd/AddOrUpdate factory

Usage

Run this recipe

In order to run C# recipes, you will need to use the Moderne CLI.

Once the CLI is installed, you can install this C# recipe package by running the following command:

Install the recipe package

mod config recipes nuget install OpenRewrite.Recipes.CSharp.CodeQuality

Then, you can run the recipe via:

Run the recipe

mod run . --recipe OpenRewrite.Recipes.CSharp.CodeQuality.Performance.PerformanceCodeQuality