this is performance enhanced simple json parser using memory span

SpanJsonParser.cs

public void ParseJson(ReadOnlySpan<char> jsonData)
{
    // Find the start of the value for a specific key
    ReadOnlySpan<char> key = "name";
    int keyStart = jsonData.IndexOf(key);

    if (keyStart == -1)
    {
        Console.WriteLine("Key not found");
        return;
    }

    // Move past the key and find the colon
    int valueStart = jsonData.Slice(keyStart + key.Length).IndexOf(':') + keyStart + key.Length + 1;
    int valueEnd = jsonData.Slice(valueStart).IndexOf(',');

    if (valueEnd == -1) // If no comma, this is the last value
    {
        valueEnd = jsonData.Slice(valueStart).IndexOf('}');
    }

    // Extract and print the value
    ReadOnlySpan<char> value = jsonData.Slice(valueStart, valueEnd);
    Console.WriteLine(value.ToString().Trim('"')); // Remove quotes
}


public void ProcessJsonArray(ReadOnlySpan<char> jsonArray)
{
    int currentIndex = 0;

    while (currentIndex < jsonArray.Length)
    {
        int start = jsonArray.Slice(currentIndex).IndexOf('{');
        if (start == -1) break; // No more objects

        int end = jsonArray.Slice(currentIndex).IndexOf('}');
        if (end == -1) break; // Incomplete object

        ReadOnlySpan<char> jsonObject = jsonArray.Slice(currentIndex + start, end - start + 1);
        ProcessJsonObject(jsonObject);

        currentIndex += end + 1; // Move past the current object
    }
}

private void ProcessJsonObject(ReadOnlySpan<char> jsonObject)
{
    // Simple key-value extraction, assuming keys and values are properly formatted
    int colonIndex = jsonObject.IndexOf(':');
    ReadOnlySpan<char> key = jsonObject.Slice(1, colonIndex - 2); // Skipping surrounding quotes
    ReadOnlySpan<char> value = jsonObject.Slice(colonIndex + 1).Trim(); // Extract value and trim

    Console.WriteLine($"Key: {key.ToString()}, Value: {value.ToString()}");
}

public void ParseJson(ReadOnlySpan<char> jsonData)
{
    int start = 0;
    while (start < jsonData.Length)
    {
        int objectStart = jsonData.Slice(start).IndexOf('{');
        if (objectStart == -1) break;

        int objectEnd = jsonData.Slice(start).IndexOf('}');
        if (objectEnd == -1) break;

        ReadOnlySpan<char> jsonObject = jsonData.Slice(start + objectStart, objectEnd - objectStart + 1);
        ProcessJsonObject(jsonObject);

        start += objectEnd + 1;
    }
}