Index: trunk/src/org/openstreetmap/josm/tools/Stopwatch.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/Stopwatch.java	(revision 17617)
+++ trunk/src/org/openstreetmap/josm/tools/Stopwatch.java	(revision 17618)
@@ -23,5 +23,5 @@
      */
     public static Stopwatch createStarted() {
-        return new Stopwatch(System.currentTimeMillis());
+        return new Stopwatch(System.nanoTime());
     }
 
@@ -32,5 +32,5 @@
      */
     public long elapsed() {
-        return System.currentTimeMillis() - start;
+        return (System.nanoTime() - start) / 1_000_000;
     }