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	<title>Comments on: Java Performance in 64bit land</title>
	<atom:link href="http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/</link>
	<description>A clever tagline should go here</description>
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		<title>By: Roo&#8217;s View &#187; Blog Archive &#187; 64bit Follow-up</title>
		<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/comment-page-1/#comment-355</link>
		<dc:creator>Roo&#8217;s View &#187; Blog Archive &#187; 64bit Follow-up</dc:creator>
		<pubDate>Wed, 26 Nov 2008 04:12:37 +0000</pubDate>
		<guid isPermaLink="false">http://www.lowtek.ca/roo/?p=166#comment-355</guid>
		<description>[...] spike was generated by my posting about 64bit java performance, and this post is a follow up to provide a bit more data on some areas I touched [...]</description>
		<content:encoded><![CDATA[<p>[...] spike was generated by my posting about 64bit java performance, and this post is a follow up to provide a bit more data on some areas I touched [...]</p>
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	<item>
		<title>By: Rob</title>
		<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/comment-page-1/#comment-342</link>
		<dc:creator>Rob</dc:creator>
		<pubDate>Tue, 18 Nov 2008 15:13:15 +0000</pubDate>
		<guid isPermaLink="false">http://www.lowtek.ca/roo/?p=166#comment-342</guid>
		<description>It also will say more about the relative file handling speeds of the O/Ss than anything else. I suspect Vista is worse because it&#039;s file handing is supposed to be worse.

Great article though.</description>
		<content:encoded><![CDATA[<p>It also will say more about the relative file handling speeds of the O/Ss than anything else. I suspect Vista is worse because it&#8217;s file handing is supposed to be worse.</p>
<p>Great article though.</p>
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	<item>
		<title>By: Marc</title>
		<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/comment-page-1/#comment-335</link>
		<dc:creator>Marc</dc:creator>
		<pubDate>Fri, 07 Nov 2008 18:04:57 +0000</pubDate>
		<guid isPermaLink="false">http://www.lowtek.ca/roo/?p=166#comment-335</guid>
		<description>This is an invalid test Shahzd - the fact is that because you&#039;re using two different operating system generations, there are any number of factors which could cause a difference.  For a true comparison, you would need to run XP64 bit vs XP32bit; or Vista64bit v Vista32bit.  

Outside of that: define &quot;higher&quot; - it completes more (thus performs better) or it runs longer (thus performs worse)?</description>
		<content:encoded><![CDATA[<p>This is an invalid test Shahzd &#8211; the fact is that because you&#8217;re using two different operating system generations, there are any number of factors which could cause a difference.  For a true comparison, you would need to run XP64 bit vs XP32bit; or Vista64bit v Vista32bit.  </p>
<p>Outside of that: define &#8220;higher&#8221; &#8211; it completes more (thus performs better) or it runs longer (thus performs worse)?</p>
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	<item>
		<title>By: Shahzad</title>
		<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/comment-page-1/#comment-334</link>
		<dc:creator>Shahzad</dc:creator>
		<pubDate>Fri, 07 Nov 2008 06:23:39 +0000</pubDate>
		<guid isPermaLink="false">http://www.lowtek.ca/roo/?p=166#comment-334</guid>
		<description>From your blog, it seems that moving from 32 -&gt; 64 would be a performance trade. I have done a small experiment, and would like to share it with you. I used Windows XP (32 bit) &amp; Windows Vista (64 bit). Both these operating systems are running on 2.2Ghz Core 2 Duo machine. The performance of windows XP for running a simple loop is much higher than Windows Vista. Any comments?

Here is the code ...
int chapter=0 , len = 26 ;
		RandomAccessFile raf = null ;
		try {
			String tmp = null , line = &quot;&quot; ;
			raf = new RandomAccessFile ( &quot;abc.txt&quot;, &quot;rw&quot; ) ;
			for ( long i = 0 ; chapter &lt; 6 ; i ++ ) {
				tmp = scaleScore(i) ; // it generates a hexa decimal number out of the number.
				line = tmp + &quot;,&quot; + line ; 
				chapter = tmp.length() ;
				
				if (i%len == len-1 ) {
					System.out.println(line);
					line += &quot;\r\n&quot; ;
					raf.writeBytes(line) ;
					line = &quot;&quot; ;
				} // end of if
			}
		} catch (Exception e) {
			e.printStackTrace() ;
		} finally {
			if ( raf != null ) {
				try {
					raf.close() ;
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}</description>
		<content:encoded><![CDATA[<p>From your blog, it seems that moving from 32 -&gt; 64 would be a performance trade. I have done a small experiment, and would like to share it with you. I used Windows XP (32 bit) &amp; Windows Vista (64 bit). Both these operating systems are running on 2.2Ghz Core 2 Duo machine. The performance of windows XP for running a simple loop is much higher than Windows Vista. Any comments?</p>
<p>Here is the code &#8230;<br />
int chapter=0 , len = 26 ;<br />
		RandomAccessFile raf = null ;<br />
		try {<br />
			String tmp = null , line = &#8220;&#8221; ;<br />
			raf = new RandomAccessFile ( &#8220;abc.txt&#8221;, &#8220;rw&#8221; ) ;<br />
			for ( long i = 0 ; chapter &lt; 6 ; i ++ ) {<br />
				tmp = scaleScore(i) ; // it generates a hexa decimal number out of the number.<br />
				line = tmp + &#8220;,&#8221; + line ;<br />
				chapter = tmp.length() ;</p>
<p>				if (i%len == len-1 ) {<br />
					System.out.println(line);<br />
					line += &#8220;\r\n&#8221; ;<br />
					raf.writeBytes(line) ;<br />
					line = &#8220;&#8221; ;<br />
				} // end of if<br />
			}<br />
		} catch (Exception e) {<br />
			e.printStackTrace() ;<br />
		} finally {<br />
			if ( raf != null ) {<br />
				try {<br />
					raf.close() ;<br />
				} catch (IOException e) {<br />
					e.printStackTrace();<br />
				}<br />
			}<br />
		}</p>
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		<title>By: Attention 64-bit JVM Users &#171; Unleash the Tech Freak Inside</title>
		<link>http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/comment-page-1/#comment-333</link>
		<dc:creator>Attention 64-bit JVM Users &#171; Unleash the Tech Freak Inside</dc:creator>
		<pubDate>Thu, 06 Nov 2008 15:46:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.lowtek.ca/roo/?p=166#comment-333</guid>
		<description>[...] http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/ http://blog.juma.me.uk/2008/10/14/32-bit-or-64-bit-jvm-how-about-a-hybrid/ http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp?topic=/com.ibm.java.doc.user.lnx.60/user/garbage_compressed_refs.html     &#171; Attention Fedora&#160;users! [...]</description>
		<content:encoded><![CDATA[<p>[...] <a href="http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/" rel="nofollow">http://www.lowtek.ca/roo/2008/java-performance-in-64bit-land/</a> <a href="http://blog.juma.me.uk/2008/10/14/32-bit-or-64-bit-jvm-how-about-a-hybrid/" rel="nofollow">http://blog.juma.me.uk/2008/10/14/32-bit-or-64-bit-jvm-how-about-a-hybrid/</a> <a href="http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp?topic=/com.ibm.java.doc.user.lnx.60/user/garbage_compressed_refs.html" rel="nofollow">http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp?topic=/com.ibm.java.doc.user.lnx.60/user/garbage_compressed_refs.html</a>     &laquo; Attention Fedora&nbsp;users! [...]</p>
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