From 7e8f6b7fd1c7046edde296e13d23af1c314fd44c Mon Sep 17 00:00:00 2001
From: Ramkumar Aiyengar <andyetitmoves@apache.org>
Date: Sat, 14 Mar 2015 21:58:26 +0000
Subject: [PATCH] SOLR-6275: Remove nanoTime speed test

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1666754 13f79535-47bb-0310-9956-ffa450edef68
---
 .../test/org/apache/solr/util/TestUtils.java  | 47 -------------------
 1 file changed, 47 deletions(-)

diff --git a/solr/core/src/test/org/apache/solr/util/TestUtils.java b/solr/core/src/test/org/apache/solr/util/TestUtils.java
index 5b56a5b1fde..e144d21b323 100644
--- a/solr/core/src/test/org/apache/solr/util/TestUtils.java
+++ b/solr/core/src/test/org/apache/solr/util/TestUtils.java
@@ -18,23 +18,15 @@
 package org.apache.solr.util;
 
 import java.util.Arrays;
-import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
 
 import org.apache.solr.SolrTestCaseJ4;
-import org.apache.solr.common.util.ExecutorUtil;
 import org.apache.solr.common.util.SimpleOrderedMap;
 import org.apache.solr.common.util.StrUtils;
 import org.junit.Assert;
-import org.junit.Test;
 
 /**
  *
@@ -162,43 +154,4 @@ public class TestUtils extends SolrTestCaseJ4 {
     assertEquals( num, NumberUtils.SortableStr2long(sortable, 0, sortable.length() ) );
     assertEquals( Long.toString(num), NumberUtils.SortableStr2long(sortable) );
   }
-
-  @Test
-  public void testNanoTimeSpeed()
-  {
-    final int maxNumThreads = 100;
-    final int numIters = 1000;
-    if (VERBOSE) log.info("testNanoTime: maxNumThreads = {}, numIters = {}", maxNumThreads, numIters);
-
-    final ExecutorService workers = Executors.newCachedThreadPool(new DefaultSolrThreadFactory("nanoTimeTestThread"));
-
-    for (int numThreads = 1; numThreads <= maxNumThreads; numThreads++) {
-      List<Callable<Long>> tasks = new ArrayList<> ();
-      for (int i = 0; i < numThreads; i ++) {
-        tasks.add(new Callable<Long>() {
-          @Override
-          public Long call() {
-            final long startTime = System.nanoTime();
-            for (int i = 0; i < numIters; i++) {
-              System.nanoTime();
-            }
-            return System.nanoTime() - startTime;
-          }
-        });
-      }
-
-      try {
-        List<Future<Long>> results = workers.invokeAll(tasks);
-        long totalTime = 0;
-        for (Future<Long> res : results) {
-          totalTime += res.get();
-        }
-        long timePerIter = totalTime / (numIters * numThreads);
-        assertTrue("Time taken for System.nanoTime is too high", timePerIter < 10000);
-        if (VERBOSE) log.info("numThreads = {}, time_per_call = {}ns", numThreads, timePerIter);
-      } catch (InterruptedException | ExecutionException ignored) {}
-    }
-
-    ExecutorUtil.shutdownAndAwaitTermination(workers);
-  }
 }