controlflow

    [Pure, ContractAnnotation("null => false")]
    public static bool IsValueTuple([CanBeNull] this ITypeElement typeElement)
    {
      var structType = typeElement as IStruct;
      if (structType == null) return false;

      return typeElement.ShortName == "ValueTuple"
             && typeElement.GetContainingNamespace() is INamespace ns
             && ns.ShortName == "System"
             && ns.GetContainingNamespace() is INamespace root

controlflow

BenchmarkDotNet=v0.12.0, OS=Windows 10.0.17763.805 (1809/October2018Update/Redstone5), VM=VMware
Intel Core i7-7700K CPU 4.20GHz (Kaby Lake), 1 CPU, 4 logical and 4 physical cores
  [Host]     : .NET Framework 4.8 (4.8.4018.0), X86 LegacyJIT
  DefaultJob : .NET Framework 4.8 (4.8.4018.0), X86 LegacyJIT


|         Method | Count |        Mean |     Error |    StdDev | Rank |
|--------------- |------ |------------:|----------:|----------:|-----:|
|       IntArray |  1000 |    260.9 ns |   3.25 ns |   3.04 ns |    1 |
|    StringArray |  1000 |  3,372.6 ns |  25.71 ns |  22.79 ns |    4 |

controlflow

BenchmarkDotNet=v0.12.0, OS=Windows 10.0.17763.805 (1809/October2018Update/Redstone5), VM=VMware
Intel Core i7-7700K CPU 4.20GHz (Kaby Lake), 1 CPU, 4 logical and 4 physical cores
.NET Core SDK=2.1.507
  [Host]     : .NET Core 2.1.11 (CoreCLR 4.6.27617.04, CoreFX 4.6.27617.02), X64 RyuJIT
  DefaultJob : .NET Core 2.1.11 (CoreCLR 4.6.27617.04, CoreFX 4.6.27617.02), X64 RyuJIT


|         Method | Count |        Mean |     Error |    StdDev | Rank |
|--------------- |------ |------------:|----------:|----------:|-----:|
|       IntArray |  1000 |    407.0 ns |   5.17 ns |   4.84 ns |    1 |

controlflow

using System;
using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;
// ReSharper disable RedundantToStringCall
// ReSharper disable NotAccessedField.Local
#pragma warning disable 169

BenchmarkRunner.Run<NullChecksBenchmark>();

controlflow

using System.Text;

PrintNumber(0f);
PrintNumber(-0f);
PrintNumber(1f);
PrintNumber(-1f);
PrintNumber(float.PositiveInfinity);
PrintNumber(float.NegativeInfinity);
PrintNumber(float.NaN);
PrintNumber(float.Epsilon);

controlflow

using System;
using System.Threading;
using JetBrains.Annotations;

namespace JetBrains.Util.Concurrency.Threading;

/// <summary>
/// Reader-writer lock for reader-heavy scenarios.
/// </summary>
public sealed class StripedReaderWriterLock