Performance Testing of Utf8JsonReader and JsonNode for JSON Parsing

数据：

格式：

  {
    "a_tttttttttttt": 1001,
    "b_tttttttttttt": "邱平",
    "c_tttttttttttt": "Nancy Lee",
    "d_tttttttttttt": "buqdu",
    "e_tttttttttttt": 81.26,
    "f_tttttttttttt": 60,
    "g_tttttttttttt": "1990-04-18 10:52:59",
    "h_tttttttttttt": "35812178",
    "i_tttttttttttt": "18935337799",
    "j_tttttttttttt": "w.nsliozye@mbwrxiyf.ug",
    "k_tttttttttttt": "浙江省 金华市 兰溪市"
  }

基础：

[SimpleJob(RuntimeMoniker.Net60)]
[MarkdownExporter, AsciiDocExporter, HtmlExporter, CsvExporter, RPlotExporter]
public class ParseJson
{
	private ReadOnlySequence<byte> sequence;

	[Params("100.json", "1000.json", "10000.json")]
	public string FileName;

	[GlobalSetup]
	public async Task Setup()
	{
		var text = File.ReadAllText(Path.Combine(Environment.CurrentDirectory, $"json/{FileName}"));
		var bytes = Encoding.UTF8.GetBytes(text);
		sequence = new ReadOnlySequence<byte>(bytes);
	}
..... .....
}
	

Utf8JsonReader :

	
	[Benchmark]
	public void Utf8JsonReader()
	{
		var reader = new Utf8JsonReader(sequence, new JsonReaderOptions());
		UB(ref reader);
	}

	private static void UB(ref Utf8JsonReader reader)
	{
		while (reader.Read())
		{
			if (reader.TokenType is JsonTokenType.StartArray)
			{
				UA(ref reader);
			}
			else if (reader.TokenType is JsonTokenType.EndObject) break;
			else if (reader.TokenType is JsonTokenType.PropertyName)
			{
				reader.Read();
				if (reader.TokenType is JsonTokenType.StartArray)
				{
					// enter array handling
					UA(ref reader);
				}
				else if (reader.TokenType is JsonTokenType.StartObject)
				{
					UB(ref reader);
				}
				else
				{
				}
			}
		}
	}

	private static void UA(ref Utf8JsonReader reader)
	{
		while (reader.Read())
		{
			if (reader.TokenType is JsonTokenType.EndArray) break;
			switch (reader.TokenType)
			{
				case JsonTokenType.StartObject:
					UB(ref reader);
					break;
				// [...,[],...]
				case JsonTokenType.StartArray:
					UA(ref reader);
					break;
			}
		}
	}

JsonNode：

	[Benchmark]
	public void JsonNode()
	{
		var reader = new Utf8JsonReader(sequence, new JsonReaderOptions());
		var nodes = System.Text.Json.Nodes.JsonNode.Parse(ref reader, null);
		if (nodes is JsonObject o)
		{
			JB(o);
		}
		else if (nodes is JsonArray a)
		{
			JA(a);
		}
	}

	private static void JB(JsonObject obj)
	{
		foreach (var item in obj)
		{
			var v = item.Value;
			if (v is JsonObject o)
			{
				JB(o);
			}
			else if (v is JsonArray a)
			{
				JA(a);
			}
			else if (v is JsonValue value)
			{
				var el = value.GetValue<JsonElement>();
				JE(el);
			}
		}
	}

	private static void JA(JsonArray obj)
	{
		foreach (var v in obj)
		{
			if (v is JsonObject o)
			{
				JB(o);
			}
			else if (v is JsonArray a)
			{
				JA(a);
			}
			else if (v is JsonValue value)
			{
				var el = value.GetValue<JsonElement>();
				JE(el);
			}
		}
	}

	private static void JE(JsonElement obj)
	{
	}

测试结果：