<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns:MadCap="http://www.madcapsoftware.com/Schemas/MadCap.xsd" MadCap:lastBlockDepth="2" MadCap:lastHeight="120" MadCap:lastWidth="624" MadCap:disableMasterStylesheet="true" MadCap:tocPath="Tuning|Main Operations Performance|Insert Performance" MadCap:InPreviewMode="false" MadCap:RuntimeFileType="Topic" MadCap:TargetType="WebHelp" MadCap:PathToHelpSystem="../../../../" MadCap:HelpSystemFileName="index.xml" MadCap:SearchType="Stem">
<head><title>Inherited Objects </title>
<script type="text/javascript">/* <![CDATA[ */
window.onload = function(){
var pathToFlash = $('html').attr('MadCap:PathToHelpSystem') + 'Content/Resources/Code/ZeroClipboard.swf';
ZeroClipboard.setMoviePath(pathToFlash);
function bindToClipBord(element,content){
var clip = new ZeroClipboard.Client();
clip.setText(content);
clip.glue(element);
};
if(location.protocol==='file:'){
$('.copylink-marker').remove();
} else{
$('.copylink-marker').each(function(){
var text = $(this).parent().parent().children('.prettyprint').html();
$(this).hover(function(){
bindToClipBord(this,text);
},
function(){});
});
}
prettyPrint();
};
/* ]]> */</script>
<link href="../../../SkinSupport/MadCap.css" rel="stylesheet" />
<link href="../../../Resources/Stylesheets/OnlineStyle.css" rel="stylesheet" />
<script src="../../../Resources/Code/prettify.js">
</script>
<script src="../../../Resources/Code/lang-vb.js">
</script>
<script src="../../../Resources/Code/jquery.min.js">
</script>
<script src="../../../Resources/Code/ZeroClipboard.js">
</script>
<script src="../../../SkinSupport/MadCapAll.js" type="text/javascript">
</script>
</head>
<body>
<p class="MCWebHelpFramesetLink" style="display: none;"><a href="../../../../index_CSH.html#tuning/main_operations_performance/insert_performance/inherited_objects.htm" style="">Open topic with navigation</a>
</p>
<div class="MCBreadcrumbsBox"><span class="MCBreadcrumbsPrefix">You are here: </span><a class="MCBreadcrumbsLink" href="../../../tuning.htm">Tuning</a><span class="MCBreadcrumbsDivider"> > </span><a class="MCBreadcrumbsLink" href="../../main_operations_performance.htm">Main Operations Performance</a><span class="MCBreadcrumbsDivider"> > </span><a class="MCBreadcrumbsLink" href="../insert_performance.htm">Insert Performance</a><span class="MCBreadcrumbsDivider"> > </span><span class="MCBreadcrumbs">Inherited Objects</span>
</div>
<p>
<script type="text/javascript">/*<![CDATA[*/document.write('<a href="' + location.href +'">');
document.write("Direct Link");
document.write('</a>');/*]]>*/</script>
</p>
<p>
</p>
<h1>Inherited Objects</h1>
<p>Inherited objects are stored slower than simple objects.
That is happening, because parent class indexes are created and stored to the
database as well.</p>
<p>The following example shows the influence of a simple
inheritance on the insert performance: </p>
<p MadCap:conditions="Global.Primary:java" />
<p MadCap:conditions="Primary..NET">
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: RunInheritanceTest
private void RunInheritanceTest()
{
Configure();
Init();
Clean();
System.Console.WriteLine("Storing " + _count + " objects of depth " + _depth);
Open();
Store();
Close();
Clean();
System.Console.WriteLine("Storing " + _count + " inherited objects of depth " + _depth);
Open();
StoreInherited();
Close();
}</pre>
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: Configure
private void Configure()
{
IConfiguration config = Db4oFactory.Configure();
config.LockDatabaseFile(false);
config.WeakReferences(false);
config.Io(new MemoryIoAdapter());
config.FlushFileBuffers(false);
}</pre>
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: Init
private void Init()
{
_count = 10000;
_depth = 3;
_isClientServer = false;
}</pre>
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: Store
private void Store()
{
StartTimer();
for (int i = 0; i < _count; i++)
{
Item item = new Item("load", null);
for (int j = 1; j < _depth; j++)
{
item = new Item("load", item);
}
objectContainer.Store(item);
}
objectContainer.Commit();
StopTimer("Store " + TotalObjects() + " objects");
}</pre>
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: StoreInherited
private void StoreInherited()
{
StartTimer();
for (int i = 0; i < _count; i++)
{
ItemDerived item = new ItemDerived("load", null);
for (int j = 1; j < _depth; j++)
{
item = new ItemDerived("load", item);
}
objectContainer.Store(item);
}
objectContainer.Commit();
StopTimer("Store " + TotalObjects() + " objects");
}</pre>
<pre class="prettyprint" xml:space="preserve">InsertPerformanceBenchmark.cs: ItemDerived
public class ItemDerived : Item
{
public ItemDerived(String name, ItemDerived child)
: base(name, child)
{
}
}</pre>
</p>
<p MadCap:conditions="Global.Primary:net" />
<p>The following results were achieved for the <a href="../insert_performance.htm">testing
configuration</a>:</p>
<p MadCap:conditions="Global.Primary:java" />
<p MadCap:conditions="Primary..NET">
<p>.NET:</p>
<p>Storing 10000 objects of depth 3</p>
<p>Store 30000 objects: 1237ms</p>
<p>Storing 10000 inherited objects of depth 3</p>
<p>Store 30000 objects: 1699ms </p>
</p>
<p MadCap:conditions="Global.Primary:net" />
<p MadCap:conditions="Primary.Online">Download example code:</p>
<p MadCap:conditions="Primary.Online">
<MadCap:conditionalText MadCap:conditions="Primary..NET,Primary.c#,Primary.All languages"><a href="../performancecs.zip">c# </a>
</MadCap:conditionalText>
</p>
<script type="text/javascript" src="../../../SkinSupport/MadCapBodyEnd.js">
</script>
</body>
</html>
