diff --git a/performanceDb/src/main/java/org/lucares/performance/db/PerformanceDb.java b/performanceDb/src/main/java/org/lucares/performance/db/PerformanceDb.java
index 6e7d938..08eb1fb 100644
--- a/performanceDb/src/main/java/org/lucares/performance/db/PerformanceDb.java
+++ b/performanceDb/src/main/java/org/lucares/performance/db/PerformanceDb.java
@@ -67,7 +67,7 @@ public class PerformanceDb implements AutoCloseable, CollectionUtils {
 		long count = 0;
 
 		try {
-			long start = System.nanoTime();
+			long start = System.currentTimeMillis();
 
 			while (true) {
 				final Optional<Entry> entryOptional = entries.next();
@@ -87,16 +87,11 @@ public class PerformanceDb implements AutoCloseable, CollectionUtils {
 
 					if (count % blocksize == 0) {
 						final long end = System.nanoTime();
-						final double duration = (end - start) / 1_000_000.0;
-						LOGGER.debug("inserting the last " + blocksize + " took " + duration + " ms; " + Stats.duration
-								+ "ms of " + Stats.count + " operations. total entries: " + count / 1_000_000.0
-								+ " million");
+						final long duration = end - start;
+						LOGGER.debug("inserting the last " + blocksize + " took " + duration + " ms; total entries: "
+								+ count / 1_000_000.0 + " million");
 
-						// System.out.println(entry);
-
-						start = System.nanoTime();
-						Stats.duration = 0.0;
-						Stats.count = 0;
+						start = System.currentTimeMillis();
 					}
 
 					if (count % blocksize == 0) {
diff --git a/performanceDb/src/main/java/org/lucares/performance/db/Stats.java b/performanceDb/src/main/java/org/lucares/performance/db/Stats.java
deleted file mode 100644
index de17562..0000000
--- a/performanceDb/src/main/java/org/lucares/performance/db/Stats.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package org.lucares.performance.db;
-
-public class Stats {
-	public static double duration = 0.0;
-
-	public static long count = 0;
-
-	{
-		final long s = System.nanoTime();
-		final long e = System.nanoTime();
-		Stats.duration += (e - s) / 1_000_000.0;
-		Stats.count++;
-	}
-}