/// <summary>
        /// 요청 Uri 별 평균 처리 시간을 Update합니다.
        /// </summary>
        /// <param name="executionTimes">실행 결과 순위</param>
        /// <param name="result">새로운 처리 결과</param>
        private static void UpdateExecutionTime(ConcurrentDictionary<string, long> executionTimes, UriExecutionTime result) {
            Func<string, long, long> @updateFunc
                = (key, time) => (RankByTotalTime)
                                     ? time + result.ExecutionTime
                                     : (executionTimes[key] + result.ExecutionTime) / 2;

            executionTimes.AddOrUpdate(result.UriString, result.ExecutionTime, @updateFunc);

            //if(executionTimes.ContainsKey(result.UriString))
            //{
            //    if(RankByTotalTime)
            //        executionTimes[result.UriString] += result.ExecutionTime;
            //    else
            //        executionTimes[result.UriString] = (executionTimes[result.UriString] + result.ExecutionTime) / 2L;
            //}
            //else
            //    executionTimes.Add(result.UriString, result.ExecutionTime);
        }
 /// <summary>
 /// 페이지별 처리 빈도 수를 설정합니다.
 /// </summary>
 /// <param name="frequencies"></param>
 /// <param name="result"></param>
 private static void UpdateExecutionFrequency(ConcurrentDictionary<string, int> frequencies, UriExecutionTime result) {
     frequencies.AddOrUpdate(result.UriString, 1, (key, value) => value + 1);
 }
        private static void PostRequestHandlerExecuteHandler(object sender, EventArgs e) {
            var context = sender as HttpContext;
            if(context == null)
                return;

            if(PageStopwatch == null)
                return;

            PageStopwatch.Stop();

            var result = new UriExecutionTime(context.Request.RawUrl, PageStopwatch.ElapsedMilliseconds);

            // 실행 결과를 Producing 합니다.
            _pageExecutionResults.TryAdd(result);

            if(IsDebugEnabled)
                log.Debug("Page 처리에 대한 성능 측정을 완료했습니다. Request=[{0}], ExecutionTime=[{1}]", result.UriString, result.ExecutionTime);
        }