using System.Text;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Reports;

namespace BenchmarkDotNet.Samples
{
    [Config(typeof(Config))]
    [SimpleJob(RuntimeMoniker.Net80)]
    [MemoryDiagnoser]
    [HideColumns(Column.RatioSD, Column.AllocRatio, Column.Error, Column.StdDev)]
    public class StringConcatInLoop
    {
        [Params(50, 50000)]
        public int Total { get; set; }

        [Benchmark(Baseline = true)]
        public string Plus()
        {
            var result = string.Empty;
            for (int i = 0; i < Total; i++)
            {
                result = result + '*';
            }

            return result;
        }

        [Benchmark]
        public string SB()
        {
            StringBuilder result = new StringBuilder();
            for (int i = 0; i < Total; i++)
            {
                result.Append('*');
            }

            return result.ToString();
        }

        private class Config : ManualConfig
        {
            public Config()
            {
                SummaryStyle =
                    SummaryStyle.Default.WithRatioStyle(RatioStyle.Percentage)
                    .WithTimeUnit(Perfolizer.Horology.TimeUnit.Millisecond);
            }
        }
    }
}

// .NET 8
public string Plus()
{
    string text = string.Empty;
    int num = 0;
    while (num < Total)
    {
        text = string.Concat(text, "*");
        num++;
    }
    return text;
}

// .NET 8
public string SB()
{
    StringBuilder stringBuilder = new StringBuilder();
    int num = 0;
    while (num < Total)
    {
        stringBuilder.Append('*');
        num++;
    }
    return stringBuilder.ToString();
}

// .NET 8
.method public hidebysig 
    instance string Plus () cil managed 
{
    .custom instance void [System.Runtime]System.Runtime.CompilerServices.NullableContextAttribute::.ctor(uint8) = (
        01 00 01 00 00
    )
    .custom instance void [BenchmarkDotNet.Annotations]BenchmarkDotNet.Attributes.BenchmarkAttribute::.ctor(int32, string) = (
        01 00 1e 00 00 00 01 5f 01 00 54 02 08 42 61 73
        65 6c 69 6e 65 01
    )
    // Method begins at RVA 0x2064
    // Code size 37 (0x25)
    .maxstack 2
    .locals init (
        [0] string result,
        [1] int32 i
    )

    // sequence point: (line 33, col 13) to (line 33, col 39) in _
    IL_0000: ldsfld string [System.Runtime]System.String::Empty
    IL_0005: stloc.0
    // sequence point: (line 34, col 18) to (line 34, col 27) in _
    IL_0006: ldc.i4.0
    IL_0007: stloc.1
    // sequence point: hidden
    IL_0008: br.s IL_001a
    // loop start (head: IL_001a)
        // sequence point: (line 36, col 17) to (line 36, col 39) in _
        IL_000a: ldloc.0
        IL_000b: ldstr "*"
        IL_0010: call string [System.Runtime]System.String::Concat(string, string)
        IL_0015: stloc.0
        // sequence point: (line 34, col 40) to (line 34, col 43) in _
        IL_0016: ldloc.1
        IL_0017: ldc.i4.1
        IL_0018: add
        IL_0019: stloc.1

        // sequence point: (line 34, col 29) to (line 34, col 38) in _
        IL_001a: ldloc.1
        IL_001b: ldarg.0
        IL_001c: call instance int32 BenchmarkDotNet.Samples.StringConcatInLoop::get_Total()
        IL_0021: blt.s IL_000a
    // end loop

    // sequence point: (line 39, col 13) to (line 39, col 27) in _
    IL_0023: ldloc.0
    IL_0024: ret
}

// .NET 8
.method public hidebysig 
    instance string SB () cil managed 
{
    .custom instance void [System.Runtime]System.Runtime.CompilerServices.NullableContextAttribute::.ctor(uint8) = (
        01 00 01 00 00
    )
    .custom instance void [BenchmarkDotNet.Annotations]BenchmarkDotNet.Attributes.BenchmarkAttribute::.ctor(int32, string) = (
        01 00 2a 00 00 00 01 5f 00 00
    )
    // Method begins at RVA 0x2098
    // Code size 39 (0x27)
    .maxstack 2
    .locals init (
        [0] class [System.Runtime]System.Text.StringBuilder result,
        [1] int32 i
    )

    // sequence point: (line 45, col 13) to (line 45, col 56) in _
    IL_0000: newobj instance void [System.Runtime]System.Text.StringBuilder::.ctor()
    IL_0005: stloc.0
    // sequence point: (line 46, col 18) to (line 46, col 27) in _
    IL_0006: ldc.i4.0
    IL_0007: stloc.1
    // sequence point: hidden
    IL_0008: br.s IL_0017
    // loop start (head: IL_0017)
        // sequence point: (line 48, col 17) to (line 48, col 36) in _
        IL_000a: ldloc.0
        IL_000b: ldc.i4.s 42
        IL_000d: callvirt instance class [System.Runtime]System.Text.StringBuilder [System.Runtime]System.Text.StringBuilder::Append(char)
        IL_0012: pop
        // sequence point: (line 46, col 40) to (line 46, col 43) in _
        IL_0013: ldloc.1
        IL_0014: ldc.i4.1
        IL_0015: add
        IL_0016: stloc.1

        // sequence point: (line 46, col 29) to (line 46, col 38) in _
        IL_0017: ldloc.1
        IL_0018: ldarg.0
        IL_0019: call instance int32 BenchmarkDotNet.Samples.StringConcatInLoop::get_Total()
        IL_001e: blt.s IL_000a
    // end loop

    // sequence point: (line 51, col 13) to (line 51, col 38) in _
    IL_0020: ldloc.0
    IL_0021: callvirt instance string [System.Runtime]System.Object::ToString()
    IL_0026: ret
}