新的空asp.net core 项目，加入下面的代码，试过连接池，效果不明显。
只输出hello world的话php 6000左右 asp.net core 10000左右，加了数据访问，php 1000左右，asp.net core就600左右了，我想asp.net core绝不会这样。

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace webapp
{
public class Startup
{

    string constructorString = "server=localhost;uid=root;pwd=123456;Database=test;";
     
    // This method gets called by the runtime. Use this method to add services to the container.
    // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddRouting(configureOptions => {
            configureOptions.LowercaseUrls = true;

        });
    }


    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/", async context =>
            {
                var list = new List<Dictionary<string, string>>();
                MySqlConnection myConnnect;
                MySqlCommand sqlCmd;
                myConnnect = new MySqlConnection(constructorString);
                sqlCmd = new MySqlCommand();
                sqlCmd.Connection = myConnnect;
                sqlCmd.CommandText = "select * from location where parent_id=0";
                await myConnnect.OpenAsync();
                
                using (var reader = await sqlCmd.ExecuteReaderAsync(System.Data.CommandBehavior.CloseConnection))
                {
                    while (await reader.ReadAsync())
                    {
                        var data = new Dictionary<string, string>();
                        data["id"] = reader.GetInt32(0).ToString();
                        data["spell_first"] = reader.GetString(2);
                        data["spell_full"] = reader.GetString(3);
                        data["name"] = reader.GetString(4);
                        list.Add(data);
                    }
                }


                await context.Response.WriteAsync("Hello World!");
            });
        });
    }
}

}