Axiom.Graphics.RenderTarget.UpdateStatistics C# (CSharp) Method

        protected void UpdateStatistics()
        {
            frameCount++;
            var thisTime = _timer.Milliseconds;

            // check frame time
            var frameTime = thisTime - lastTime;
            lastTime = thisTime;

            stats.BestFrameTime = Math.Utility.Min(stats.BestFrameTime, frameTime);
            stats.WorstFrameTime = Math.Utility.Max(stats.WorstFrameTime, frameTime);

            // check if new second (update only once per second)
            if (thisTime - lastSecond <= 1000)
                return;

            // new second - not 100% precise
            stats.LastFPS = (float)frameCount / (thisTime - lastSecond) * 1000;

            if (stats.AverageFPS == 0)
                stats.AverageFPS = stats.LastFPS;
            else
                stats.AverageFPS = (stats.AverageFPS + stats.LastFPS) / 2; // not strictly correct, but good enough

            stats.BestFPS = Math.Utility.Max(stats.BestFPS, stats.LastFPS);
            stats.WorstFPS = Math.Utility.Min(stats.WorstFPS, stats.LastFPS);

            lastSecond = thisTime;
            frameCount = 0;
        }