Ahmet
Murat Yıldırım.

public class PerfTimingMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ILogger<PerfTimingMiddleware> _logger;

    public PerfTimingMiddleware(RequestDelegate next, ILogger<PerfTimingMiddleware> logger)
    {
        _next = next;
        _logger = logger;
    }

    public async Task InvokeAsync(HttpContext context)
    {
        var sw = Stopwatch.StartNew();

        try
        {
            await _next(context);
        }
        finally
        {
            sw.Stop();

            using (LogContext.PushProperty("IsPerf", true))
            {
                _logger.LogInformation(
                    "PERF | {Method} {Path} => {StatusCode} in {ElapsedMs} ms",
                    context.Request.Method,
                    context.Request.Path,
                    context.Response?.StatusCode,
                    sw.ElapsedMilliseconds);
            }
        }
    }
}