Install-Package MiniProfiler.AspNetCore.Mvc 

public void ConfigureServices(IServiceCollection services)

{

            //EFCore性能监控

            services.AddMiniProfiler().AddEntityFramework();

            ...

}        

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IMemoryCache cache)

{

    app.UseMiniProfiler();

    // The call to app.UseMiniProfiler must come before the call to app.UseMvc

    app.UseMvc(routes =>

    {

        // ...

    });

}