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public static class PerformanceLogExtension

{

 public static IApplicationBuilder UsePerformanceLog(this IApplicationBuilder applicationBuilder)

 {

  applicationBuilder.Use(async (context, next) =>

   {

    var profiler = new StopwatchProfiler();

    profiler.Start();

    await next();

    profiler.Stop();

    var logger = context.RequestServices.GetService<ILoggerFactory>()

     .CreateLogger("PerformanceLog");

    logger.LogInformation("TraceId:{TraceId}, RequestMethod:{RequestMethod}, RequestPath:{RequestPath}, ElapsedMilliseconds:{ElapsedMilliseconds}, Response StatusCode: {StatusCode}",

          context.TraceIdentifier, context.Request.Method, context.Request.Path, profiler.ElapsedMilliseconds, context.Response.StatusCode);

   });

  return applicationBuilder;

 }

}

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app.UsePerformanceLog();

app.UseAuthentication();

app.UseMvc(routes =>

 {

  // ...

 });

// ...