Fix string.Split regression

[hamarb123]

Fixes #130418 (probably).

/cc @tannergooding

[hamarb123]

Nevermind, this won't fix it - misread the platform - will re-open when I fix the code.

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[hamarb123]

@EgorBot -amd -arm -intel

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
        [Benchmark]
        [Arguments("A B C D E F G H I J K L M N O P Q R S T U V W X Y Z", new char[] { ' ' }, StringSplitOptions.None)]
        [Arguments("A B C D E F G H I J K L M N O P Q R S T U V W X Y Z", new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.None)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        public string[] Split(string s, char[] arr, StringSplitOptions options)
            => s.Split(arr, options);
}

[hamarb123]

@EgorBot -ubuntu24_azure_cobalt100

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
        [Benchmark]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWX", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXY", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ123", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1234", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12345", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        public string[] Split(string s, char[] arr, StringSplitOptions options)
            => s.Split(arr, options);
}

[hamarb123]

@EgorBot -ubuntu24_azure_cobalt100 -arm -amd -intel

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
        [Benchmark]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWX", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXY", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ123", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1234", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12345", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        public string[] Split(string s, char[] arr, StringSplitOptions options)
            => s.Split(arr, options);
}

[hamarb123]

@EgorBot -ubuntu24_azure_cobalt100 -arm -amd -intel

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
        [Benchmark]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWX", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXY", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ123", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1234", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12345", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        public string[] Split(string s, char[] arr, StringSplitOptions options)
            => s.Split(arr, options);
}

[hamarb123]

@EgorBot -ubuntu24_azure_cobalt100 -arm -amd -intel

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
        [Benchmark]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWX", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXY", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ123", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ1234", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        [Arguments("ABCDEFGHIJKLMNOPQRSTUVWXYZ12345", new char[]{' '}, StringSplitOptions.RemoveEmptyEntries)]
        public string[] Split(string s, char[] arr, StringSplitOptions options)
            => s.Split(arr, options);
}