ZString.Join is looklike bad

[BoysheO]

see this benchmark.ZString.Join is more slow and no power in memory?

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19043.1766 (21H1/May2021Update)
AMD Ryzen 9 5900X, 1 CPU, 24 logical and 12 physical cores
.NET SDK=6.0.300
  [Host]               : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
  .NET 6.0             : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
  .NET Framework 4.6.1 : .NET Framework 4.8 (4.8.4515.0), X64 RyuJIT

Method	Job	Runtime	Source	Mean	Error	StdDev	Ratio	RatioSD	Gen 0	Allocated
StringJoin	.NET 6.0	.NET 6.0	String[3]	17.68 ns	0.241 ns	0.226 ns	1.00	0.00	0.0019	32 B
ZStringJoin	.NET 6.0	.NET 6.0	String[3]	44.23 ns	0.466 ns	0.436 ns	2.50	0.03	0.0019	32 B
StringJoin	.NET 6.0	.NET 6.0	String[5]	24.33 ns	0.121 ns	0.113 ns	1.38	0.02	0.0024	40 B
ZStringJoin	.NET 6.0	.NET 6.0	String[5]	57.08 ns	0.255 ns	0.226 ns	3.23	0.04	0.0024	40 B
StringJoin	.NET Framework 4.6.1	.NET Framework 4.6.1	String[3]	34.09 ns	0.062 ns	0.058 ns	1.00	0.00	0.0063	40 B
ZStringJoin	.NET Framework 4.6.1	.NET Framework 4.6.1	String[3]	167.40 ns	0.406 ns	0.360 ns	4.91	0.01	0.0062	40 B
StringJoin	.NET Framework 4.6.1	.NET Framework 4.6.1	String[5]	51.88 ns	0.044 ns	0.034 ns	1.52	0.00	0.0076	48 B
ZStringJoin	.NET Framework 4.6.1	.NET Framework 4.6.1	String[5]	203.03 ns	0.318 ns	0.297 ns	5.96	0.01	0.0076	48 B

[neuecc]

Could you provide benchmark code?

[BoysheO]

here:

namespace Benchmark.StringExtensions;

// [SimpleJob(RuntimeMoniker.Net60)]
// [SimpleJob(RuntimeMoniker.Mono)]
// [SimpleJob(RuntimeMoniker.Net47)]
// [SimpleJob(RuntimeMoniker.MonoAOTLLVM)]
[SimpleJob(RuntimeMoniker.Net461)]
[SimpleJob(RuntimeMoniker.Net60)]
// [SimpleJob(RuntimeMoniker.Mono)]
[RPlotExporter] 
[MemoryDiagnoser]
public class JoinAsOneString
{
    [Params(
        new[] {"1", "2", "3", "4", "5"},
        new[] {"a", "b", "c"})]
    public string[] Source;

    public const string Sp = ",";

    [Benchmark(Baseline = true)]
    public string StringJoin()
    {
        return string.Join(Sp, Source);
    }

    [Benchmark]
    public string ZStringJoin() 
    {
        return ZString.Join(Sp, Source);
    }
}

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