Use nanoTime()

1 files changed, 7 insertions, 9 deletions

diff --git a/config/src/main/java/com/yahoo/vespa/config/benchmark/LoadTester.java b/config/src/main/java/com/yahoo/vespa/config/benchmark/LoadTester.java
index 1695879625d..728648ad0cf 100644
--- a/config/src/main/java/com/yahoo/vespa/config/benchmark/LoadTester.java
+++ b/config/src/main/java/com/yahoo/vespa/config/benchmark/LoadTester.java
@@ -79,7 +79,7 @@ public class LoadTester {
         configs = readConfigs(configsList);
         defs = readDefs(defPath);
         List<LoadThread> threadList = new ArrayList<>();
-        long start = System.currentTimeMillis();
+        long startInNanos = System.nanoTime();
         Metrics m = new Metrics();
 
         for (int i = 0; i < threads; i++) {
@@ -92,7 +92,7 @@ public class LoadTester {
             lt.join();
             m.merge(lt.metrics);
         }
-        printOutput(start, threads, iterations, m);
+        printOutput(startInNanos, threads, iterations, m);
     }
 
     private Map<ConfigDefinitionKey, Tuple2<String, String[]>> readDefs(String defPath) throws IOException {
@@ -122,9 +122,8 @@ public class LoadTester {
         return ret;
     }
 
-    private void printOutput(long start, long threads, long iterations, Metrics metrics) {
-        long stop = System.currentTimeMillis();
-        float durSec = (float) (stop - start) / 1000f;
+    private void printOutput(long startInNanos, long threads, long iterations, Metrics metrics) {
+        float durSec = (float) (System.nanoTime() - startInNanos) / 1_000_000_000f;
         StringBuilder sb = new StringBuilder();
         sb.append("#reqs/sec #avglatency #minlatency #maxlatency #failedrequests\n");
         sb.append(((float) (iterations * threads)) / durSec).append(",");
@@ -215,14 +214,13 @@ public class LoadTester {
                 ConfigKey<?> configKey = createFull(reqKey.getName(), reqKey.getConfigId(), reqKey.getNamespace(), defContent.first);
                 JRTClientConfigRequest request = createRequest(configKey, defContent.second);
                 if (debug) System.out.println("# Requesting: " + reqKey);
-                long start = System.currentTimeMillis();
+                long start = System.nanoTime();
                 target.invokeSync(request.getRequest(), 10.0);
-                long end = System.currentTimeMillis();
+                long durationInMillis = (System.nanoTime() - start) / 1_000_000;
                 if (request.isError()) {
                     target = handleError(request, spec, target);
                 } else {
-                    long duration = end - start;
-                    metrics.update(duration);
+                    metrics.update(durationInMillis);
                 }
             }
         }