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SnappyData store based off Pivotal GemFireXD
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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2001, Eric D. Friedman All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////
/*
* Contains changes for GemFireXD distributed data platform.
*
* Portions Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.gemstone.gnu.trove.benchmark;
import java.util.*;
import com.gemstone.gnu.trove.*;
public class MemoryUsage {
public static long sizeOf(Creator c) {
long size= 0;
Object[] objects = new Object[100];
try {
/* Object primer = GemStoneAddition */ c.create();
long startingMemoryUse = getUsedMemory();
for (int i = 0; i < objects.length; i++) {
objects[i] = c.create();
}
long endingMemoryUse = getUsedMemory();
float approxSize = (endingMemoryUse -
startingMemoryUse) / 100f;
size = Math.round(approxSize);
} catch (Exception e) {
e.printStackTrace();
}
return size;
}
private static long getUsedMemory() {
gc();
long totalMemory = Runtime.getRuntime().totalMemory();
gc();
long freeMemory = Runtime.getRuntime().freeMemory();
long usedMemory = totalMemory - freeMemory;
return usedMemory;
}
protected static void gc() {
try {
System.gc();
Thread.sleep(100);
System.runFinalization();
Thread.sleep(100);
System.gc();
Thread.sleep(100);
System.runFinalization();
Thread.sleep(100);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
MemoryComparator set =
new MemoryComparator(new TroveSetCreator(),
new JavasoftSetCreator(),
"Compare size of Set implementation: 1,000 Integer objects measured in bytes");
set.compare();
set = null;
MemoryComparator list =
new MemoryComparator(new TroveListCreator(),
new JavasoftListCreator(),
"Compare size of LinkedList implementation: 1,000 TLinkableAdaptor objects measured in bytes");
list.compare();
list = null;
MemoryComparator list2 =
new MemoryComparator(new TroveIntArrayListCreator(),
new JavasoftIntegerArrayListCreator(),
"Compare size of int/IntegerArrayList implementation: 1,000 ints measured in bytes");
list2.compare();
list2 = null;
MemoryComparator map =
new MemoryComparator(new TroveMapCreator(),
new JavasoftMapCreator(),
"Compare size of Map implementation: 1,000 Integer->Integer mappings measured in bytes");
map.compare();
} catch (Exception e) {
e.printStackTrace();
}
System.exit(0);
}
static class MemoryComparator {
Creator trove, javasoft;
String description;
MemoryComparator(Creator trove,
Creator javasoft,
String description) {
this.trove = trove;
this.javasoft = javasoft;
this.description = description;
}
public void compare() {
gc();
long j = sizeOf(javasoft);
gc();
long t = sizeOf(trove);
long p = Math.round((double)/*GemStoneAddition*/t * 100 / j * 100) / 100;
System.out.println("--------------------------");
System.out.println(description);
System.out.println("javasoft: " + j);
System.out.println("trove: " + t);
System.out.println("trove's collection requires " + p + "% of the memory needed by javasoft's collection");
}
}
interface Creator {
Object create();
}
static class TroveIntArrayListCreator implements Creator {
public Object create() {
TIntArrayList list = new TIntArrayList();
for (int i = 0; i < 1000; i++) {
list.add(i);
}
list.trimToSize();
return list;
}
}
static class JavasoftIntegerArrayListCreator implements Creator {
public Object create() {
ArrayList list = new ArrayList();
for (int i = 0; i < 1000; i++) {
Integer x = Integer.valueOf(i);
list.add(x);
}
list.trimToSize();
return list;
}
}
static class TroveMapCreator implements Creator {
public Object create() {
THashMap map = new THashMap();
for (int i = 0; i < 1000; i++) {
Integer x = Integer.valueOf(i);
map.put(x,x);
}
return map;
}
}
static class JavasoftMapCreator implements Creator {
public Object create() {
HashMap map = new HashMap();
for (int i = 0; i < 1000; i++) {
Integer x = Integer.valueOf(i);
map.put(x,x);
}
return map;
}
}
static class TroveSetCreator implements Creator {
public Object create() {
THashSet map = new THashSet();
for (int i = 0; i < 1000; i++) {
Integer x = Integer.valueOf(i);
map.add(x);
}
return map;
}
}
static class JavasoftSetCreator implements Creator {
public Object create() {
HashSet map = new HashSet();
for (int i = 0; i < 1000; i++) {
Integer x = Integer.valueOf(i);
map.add(x);
}
return map;
}
}
static class TroveListCreator implements Creator {
public Object create() {
TLinkedList list = new TLinkedList();
for (int i = 0; i < 1000; i++) {
TLinkableAdaptor a = new TLinkableAdaptor();
list.add(a);
}
return list;
}
}
static class JavasoftListCreator implements Creator {
public Object create() {
LinkedList list = new LinkedList();
for (int i = 0; i < 1000; i++) {
TLinkableAdaptor a = new TLinkableAdaptor();
list.add(a);
}
return list;
}
}
}
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