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;
 }
}

app.UsePerformanceLog();

app.UseAuthentication();
app.UseMvc(routes =>
 {
  // ...
 });
// ...