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Test Setup
----------
CPU: 2.2 GHz Intel Core i7
RAM: 16 GB 1333 MHz DDR 3
Disk: OCZ Vertex 4 128G
Java: Java SE 1.6 (MacOS X Default)
VM Arguments: -Xmx4096m
IDE: Eclipse 4.2.1 (M20120914-1800)
Tests: JUnit 4
Test Aim
--------
This test is assessing the performance hit on using double brace
Test Conclusions
----------------
Source output
-------------
Test Runs
---------
1. TEST_COUNT = 1,000
testExternalSimpleObjectInitiation 1763281041
Time taken: 14ms
testInternalSimpleObjectInitiation 10969598
Time taken: 14ms
testTripleExternalSimpleObjectInitiation 1412485250
Time taken: 30ms
testTripleInternalSimpleObjectInitiation 906199566
Time taken: 16ms
testExternalSimpleListInitiation 1062730578
Time taken: 10ms
testInternalSimpleListInitiation 1709834834
Time taken: 8ms
2. TEST_COUNT = 10,000
testExternalSimpleObjectInitiation 1891275584
Time taken: 83ms
testInternalSimpleObjectInitiation 1133736492
Time taken: 18ms
testTripleExternalSimpleObjectInitiation 1336225759
Time taken: 28ms
testTripleInternalSimpleObjectInitiation 1709834834
Time taken: 31ms
testExternalSimpleListInitiation 1857040122
Time taken: 28ms
testInternalSimpleListInitiation 302785728
Time taken: 11ms
3. TEST_COUNT = 100,000
testExternalSimpleObjectInitiation 1891275584
Time taken: 179ms
testInternalSimpleObjectInitiation 911767762
Time taken: 64ms
testTripleExternalSimpleObjectInitiation 301671635
Time taken: 202ms
testTripleInternalSimpleObjectInitiation 322714437
Time taken: 233ms
testExternalSimpleListInitiation 1793061098
Time taken: 174ms
testInternalSimpleListInitiation 456335625
Time taken: 132ms
4. TEST_COUNT = 1,000,000
testExternalSimpleObjectInitiation 1763281041
Time taken: 917ms
testInternalSimpleObjectInitiation 950233939
Time taken: 753ms
testTripleExternalSimpleObjectInitiation 1450554350
Time taken: 2043ms
testTripleInternalSimpleObjectInitiation 21845470
Time taken: 2232ms
testExternalSimpleListInitiation 876433694
Time taken: 1338ms
testInternalSimpleListInitiation 1506092990
Time taken: 2164ms
5. TEST_COUNT = 10,000,000
testExternalSimpleObjectInitiation 1763281041
Time taken: 7662ms
testInternalSimpleObjectInitiation 911435008
Time taken: 7478ms
testTripleExternalSimpleObjectInitiation 851272462
Time taken: 18295ms
testTripleInternalSimpleObjectInitiation 1763538368
Time taken: 27457ms
testExternalSimpleListInitiation 1180697045
Time taken: 15792ms
testInternalSimpleListInitiation 747136299
Time taken: 15549ms
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Random;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class SimpleInitiationTest {
private static final int TEST_COUNT = 1000000;
private Random random = new Random();
private long start;
@Before
public void setup() {
start = Calendar.getInstance().getTimeInMillis();
}
@After
public void tearUp() {
long end = Calendar.getInstance().getTimeInMillis();
System.out.println("Time taken: " + (end - start) + "ms");
}
@Test public void testExternalSimpleObjectInitiation() {
System.out.println("testExternalSimpleObjectInitiation " + this.hashCode());
List<SimpleObject> results = new ArrayList<SimpleObject>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleObject victim = new SimpleObject();
victim.setPage(random.nextInt());
victim.setPageSize(random.nextInt());
victim.setSomeData(Double.toString(random.nextDouble()));
results.add(victim);
}
}
@Test public void testInternalSimpleObjectInitiation() {
System.out.println("testInternalSimpleObjectInitiation " + this.hashCode());
List<SimpleObject> results = new ArrayList<SimpleObject>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleObject victim = new SimpleObject() {
{
page = random.nextInt();
pageSize = random.nextInt();
someData = Double.toString(random.nextDouble());
}
};
results.add(victim);
}
}
@Test public void testTripleExternalSimpleObjectInitiation() {
System.out.println("testTripleExternalSimpleObjectInitiation " + this.hashCode());
List<SimpleObject> results = new ArrayList<SimpleObject>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleObject victim = new SimpleObject();
victim.setPage(random.nextInt());
victim.setPageSize(random.nextInt());
victim.setSomeData(Double.toString(random.nextDouble()));
results.add(victim);
SimpleObject victim2 = new SimpleObject();
victim.setPage(random.nextInt());
victim.setPageSize(random.nextInt());
victim.setSomeData(Double.toString(random.nextDouble()));
results.add(victim2);
SimpleObject victim3 = new SimpleObject();
victim.setPage(random.nextInt());
victim.setPageSize(random.nextInt());
victim.setSomeData(Double.toString(random.nextDouble()));
results.add(victim3);
}
}
@Test public void testTripleInternalSimpleObjectInitiation() {
System.out.println("testTripleInternalSimpleObjectInitiation " + this.hashCode());
List<SimpleObject> results = new ArrayList<SimpleObject>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleObject victim = new SimpleObject() {
{
page = random.nextInt();
pageSize = random.nextInt();
someData = Double.toString(random.nextDouble());
}
};
results.add(victim);
SimpleObject victim2 = new SimpleObject() {
{
page = random.nextInt();
pageSize = random.nextInt();
someData = Double.toString(random.nextDouble());
}
};
results.add(victim2);
SimpleObject victim3 = new SimpleObject() {
{
page = random.nextInt();
pageSize = random.nextInt();
someData = Double.toString(random.nextDouble());
}
};
results.add(victim3);
}
}
@Test public void testExternalSimpleListInitiation() {
System.out.println("testExternalSimpleListInitiation " + this.hashCode());
List<SimpleList<String>> results = new ArrayList<SimpleList<String>>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleList<String> victim = new SimpleList<String>();
victim.add(Integer.toString(random.nextInt()));
victim.add(Integer.toString(random.nextInt()));
victim.add(Double.toString(random.nextDouble()));
results.add(victim);
}
}
@Test public void testInternalSimpleListInitiation() {
System.out.println("testInternalSimpleListInitiation " + this.hashCode());
List<SimpleList<String>> results = new ArrayList<SimpleList<String>>(TEST_COUNT);
for (int i = 0; i < TEST_COUNT; i++) {
SimpleList<String> victim = new SimpleList<String>() {
private static final long serialVersionUID = 1L;
{
add(Integer.toString(random.nextInt()));
add(Integer.toString(random.nextInt()));
add(Double.toString(random.nextDouble()));
}
};
results.add(victim);
}
}
}
import java.util.ArrayList;
public class SimpleList<T> extends ArrayList<T> {
private static final long serialVersionUID = 1L;
}
public class SimpleObject {
protected int page;
protected int pageSize;
protected String someData;
public int getPage() {
return page;
}
public void setPage(int page) {
this.page = page;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public String getSomeData() {
return someData;
}
public void setSomeData(String someData) {
this.someData = someData;
}
}
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