Rewrite the benchmark "json-serde/1.cs"

[iamkisly]

Hi guys. I think the json-serde/1.cs example should be replaced with one that uses System.Text.Json. This is because Netonsoft.Json is becoming obsolete.. and given equivalent code with the same result, it loses a lot in performance.

using System.Text.Json;
using System.Text.Json.Serialization.Metadata;

static class Program
{
    public static async Task Main(string[] args)
    {
        var fileName = args.Length > 0 ? args[0] : "sample";
        int n;
        if (args.Length < 2 || !int.TryParse(args[1], out n))
        {
            n = 10;
        }

        var jsonStr = await File.ReadAllTextAsync($"{fileName}.json").ConfigureAwait(false);
        var jti = JsonTypeInfo.CreateJsonTypeInfo<Object>(JsonSerializerOptions.Default);
        var data = JsonSerializer.Deserialize(jsonStr, jti);

        PrintHash(JsonSerializer.Serialize(data));
        var list = new List<object>(n);
        for (var i = 0; i < n; i++)
        {
            list.Add(JsonSerializer.Deserialize(jsonStr, jti));
        }
        PrintHash(JsonSerializer.Serialize(list));
    }

The result is different enough to be significant.

BenchmarkDotNet v0.14.0, Windows 10 (10.0.19045.5011/22H2/2022Update)
Intel Core i3-8100 CPU 3.60GHz (Coffee Lake), 1 CPU, 4 logical and 4 physical cores
.NET SDK 9.0.100
  [Host]   : .NET 9.0.0 (9.0.24.52809), X64 RyuJIT AVX2
  .NET 9.0 : .NET 9.0.0 (9.0.24.52809), X64 RyuJIT AVX2

Job=.NET 9.0  Runtime=.NET 9.0  

"Simple" json

Method	Job	Runtime	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
MainNSJ	.NET 9.0	.NET 9.0	142.5 μs	0.70 μs	0.66 μs	1.00	0.01	24.4141	75.2 KB	1.00
MainSTJ	.NET 9.0	.NET 9.0	106.0 μs	1.58 μs	1.23 μs	1.00	0.02	9.2773	28.71 KB	1.00

"Canada" json file

Method	Mean	Error	StdDev	Median	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
MainNSJ	192.05 ms	3.782 ms	7.553 ms	188.58 ms	1.00	0.05	9000.0000	6000.0000	2000.0000	54.51 MB	1.00
MainSTJ	37.85 ms	0.568 ms	0.503 ms	37.81 ms	1.00	0.02	1214.2857	1000.0000	428.5714	23.98 MB	1.00

[iamkisly]

BenchmarkDotNet v0.14.0, Windows 10 (10.0.17763.6530/1809/October2018Update/Redstone5) (VMware)
Intel Xeon Gold 6248R CPU 3.00GHz, 8 CPU, 8 logical and 8 physical cores
.NET SDK 9.0.102
  [Host]   : .NET 9.0.1 (9.0.124.61010), X64 RyuJIT AVX-512F+CD+BW+DQ+VL
  .NET 9.0 : .NET 9.0.1 (9.0.124.61010), X64 RyuJIT AVX-512F+CD+BW+DQ+VL

Job=.NET 9.0  Runtime=.NET 9.0

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
MainNSJ	227.64 ms	4.539 ms	12.652 ms	1.00	0.08	3000.0000	2000.0000	1000.0000	54.51 MB	1.00
MainSTJ	49.53 ms	0.988 ms	2.083 ms	1.00	0.06	555.5556	444.4444	333.3333	19.77 MB	1.00

Increase performance by 4-5 times

[hanabi1224]

Thanks for the information. Please feel free to open a PR if you have a chance.

[iamkisly]

Please feel free to open a PR if you have a chance.

Done, please review