diff --git a/AsbCloudInfrastructure/Services/DetectOperations/OperationDetectionBackgroundService.cs b/AsbCloudInfrastructure/Services/DetectOperations/OperationDetectionBackgroundService.cs
index 16e414ae..ead356ca 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/OperationDetectionBackgroundService.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/OperationDetectionBackgroundService.cs
@@ -132,24 +132,13 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
             var startDate = begin;
             var detectedOperations = new List<DetectedOperation>(8);
 
-            var dbRequests_ = 0;
-            var dbTime_ = 0d;
-            var sw_ = new Stopwatch();
-            var otherTime_ = 0d;
-
             while (true)
             {
-                sw_.Restart();
                 var data = await query
                     .Where(d => d.DateTime > startDate)
                     .Take(take)
                     .ToArrayAsync(token);
 
-                sw_.Stop();
-                dbTime_ += sw_.ElapsedMilliseconds;
-                dbRequests_++;
-                sw_.Restart();
-
                 if (data.Length < minFragmentLength)
                     break;
 
@@ -182,16 +171,9 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
                         skip += minStepLength;
                 }
 
-                sw_.Stop();
-                otherTime_ += sw_.ElapsedMilliseconds;
-
                 if (!isDetected)
                 {
-                    if (data.Length < take)
-                        break;
-
-                    var lastPartDate = data.Last().DateTime;
-                    startDate = startDate + (0.75 * (lastPartDate - startDate));
+                    startDate = startDate.AddSeconds(0.95 * take);
                 }
             }