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174 lines
7.1 KiB
174 lines
7.1 KiB
// IndexTest.java
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// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 20.04.2009 on http://www.anomic.de
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//
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// This is a part of the kelondro database,
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// which is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.kelondro.index;
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import java.util.HashMap;
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import java.util.Random;
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import java.util.TreeMap;
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import net.yacy.cora.document.ASCII;
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import net.yacy.cora.document.UTF8;
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import net.yacy.cora.order.Base64Order;
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import net.yacy.cora.storage.HandleMap;
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import net.yacy.cora.util.SpaceExceededException;
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import net.yacy.kelondro.util.ByteArray;
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import net.yacy.kelondro.util.MemoryControl;
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/**
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* this is a speed test for performance tuning of b64 and hashing functions
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*/
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public class IndexTest {
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public static byte[] randomHash(final long r0, final long r1) {
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// a long can have 64 bit, but a 12-byte hash can have 6 * 12 = 72 bits
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// so we construct a generic Hash using two long values
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final String s = (Base64Order.enhancedCoder.encodeLongSB(Math.abs(r0), 6).toString() +
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Base64Order.enhancedCoder.encodeLongSB(Math.abs(r1), 6).toString());
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return ASCII.getBytes(s);
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}
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public static byte[] randomHash(final Random r) {
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return randomHash(r.nextLong(), r.nextLong());
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}
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public static final long mb = 1024 * 1024;
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public static void main(final String[] args) {
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// pre-generate test data so it will not influence test case time
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final int count = args.length == 0 ? 1000000 : Integer.parseInt(args[0]);
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byte[][] tests = new byte[count][];
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final Random r = new Random(0);
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for (int i = 0; i < count; i++) tests[i] = randomHash(r);
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System.out.println("generated " + count + " test data entries \n");
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// start
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System.out.println("\nSTANDARD JAVA CLASS MAPS \n");
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final long t1 = System.currentTimeMillis();
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// test tree map
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System.out.println("sorted map");
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Runtime.getRuntime().gc();
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final long freeStartTree = MemoryControl.free();
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TreeMap<byte[], Integer> tm = new TreeMap<byte[], Integer>(Base64Order.enhancedCoder);
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for (int i = 0; i < count; i++) tm.put(tests[i], 1);
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final long t2 = System.currentTimeMillis();
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System.out.println("time for TreeMap<byte[]> generation: " + (t2 - t1));
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int bugs = 0;
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for (int i = 0; i < count; i++) if (tm.get(tests[i]) == null) bugs++;
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Runtime.getRuntime().gc();
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final long freeEndTree = MemoryControl.available();
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tm.clear(); tm = null;
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final long t3 = System.currentTimeMillis();
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System.out.println("time for TreeMap<byte[]> test: " + (t3 - t2) + ", " + bugs + " bugs");
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System.out.println("memory for TreeMap<byte[]>: " + (freeStartTree - freeEndTree) / mb + " MB\n");
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// test hash map
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System.out.println("unsorted map");
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Runtime.getRuntime().gc();
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final long freeStartHash = MemoryControl.available();
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HashMap<String, Integer> hm = new HashMap<String, Integer>();
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for (int i = 0; i < count; i++) hm.put(UTF8.String(tests[i]), 1);
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final long t4 = System.currentTimeMillis();
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System.out.println("time for HashMap<String> generation: " + (t4 - t3));
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bugs = 0;
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for (int i = 0; i < count; i++) if (hm.get(UTF8.String(tests[i])) == null) bugs++;
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Runtime.getRuntime().gc();
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final long freeEndHash = MemoryControl.available();
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hm.clear(); hm = null;
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final long t5 = System.currentTimeMillis();
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System.out.println("time for HashMap<String> test: " + (t5 - t4) + ", " + bugs + " bugs");
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System.out.println("memory for HashMap<String>: " + (freeStartHash - freeEndHash) / mb + " MB\n");
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System.out.println("\nKELONDRO-ENHANCED MAPS \n");
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// test kelondro index
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System.out.println("sorted map");
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Runtime.getRuntime().gc();
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final long freeStartKelondro = MemoryControl.available();
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HandleMap ii = null;
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ii = new RowHandleMap(12, Base64Order.enhancedCoder, 4, count, "test");
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for (int i = 0; i < count; i++)
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try {
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ii.putUnique(tests[i], 1);
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} catch (SpaceExceededException e) {
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e.printStackTrace();
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}
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ii.get(randomHash(r)); // trigger sort
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final long t6 = System.currentTimeMillis();
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System.out.println("time for HandleMap<byte[]> generation: " + (t6 - t5));
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bugs = 0;
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for (int i = 0; i < count; i++) if (ii.get(tests[i]) != 1) bugs++;
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Runtime.getRuntime().gc();
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final long freeEndKelondro = MemoryControl.available();
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ii.clear(); ii.close(); ii = null;
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final long t7 = System.currentTimeMillis();
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System.out.println("time for HandleMap<byte[]> test: " + (t7 - t6) + ", " + bugs + " bugs");
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System.out.println("memory for HandleMap<byte[]>: " + (freeStartKelondro - freeEndKelondro) / mb + " MB\n");
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// test ByteArray
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System.out.println("unsorted map");
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Runtime.getRuntime().gc();
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final long freeStartBA = MemoryControl.available();
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HashMap<ByteArray, Integer> bm = new HashMap<ByteArray, Integer>();
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for (int i = 0; i < count; i++) bm.put(new ByteArray(tests[i]), 1);
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final long t8 = System.currentTimeMillis();
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System.out.println("time for HashMap<ByteArray> generation: " + (t8 - t7));
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bugs = 0;
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for (int i = 0; i < count; i++) if (bm.get(new ByteArray(tests[i])) == null) bugs++;
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Runtime.getRuntime().gc();
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final long freeEndBA = MemoryControl.available();
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bm.clear(); bm = null;
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final long t9 = System.currentTimeMillis();
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System.out.println("time for HashMap<ByteArray> test: " + (t9 - t8) + ", " + bugs + " bugs");
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System.out.println("memory for HashMap<ByteArray>: " + (freeStartBA - freeEndBA) / mb + " MB\n");
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System.exit(0);
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}
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}
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/*
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sorted map
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time for kelondroMap<byte[]> generation: 1781
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time for kelondroMap<byte[]> test: 2452, 0 bugs
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memory for kelondroMap<byte[]>: 15 MB
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unsorted map
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time for HashMap<ByteArray> generation: 828
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time for HashMap<ByteArray> test: 953, 0 bugs
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memory for HashMap<ByteArray>: 9 MB
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*/ |