<a href="http://news.zdnet.co.uk/hardware/0,1000000091,39237341,00.htm">http://news.zdnet.co.uk/hardware/0,1000000091,39237341,00.htm</a><br><br>That article is from 2005.. <br><br>not sure now.. it was a while back that I did my own testing which related to doing something along the lines of the following..
<br><br>and Indy TCP Server, multi threaded with 5 connections, each connection Doing the same task repetitively.. with 5 connecting exes all hammering the query away as fast as possible.. The test was to measure how many requests per second the server could handle.. it was doing about 20 a second (which was slow) and after forcing the server application to make use of only 1 CPU (can be done in code) it jumped to 120 processes a second.. the issue I gather is internal locking on the threads.. WIKIpedia quotes the issue as a P4 architecture issue.
<br><br><div><span class="gmail_quote">On 11/5/07, <b class="gmail_sendername">Leigh Wanstead</b> <<a href="mailto:leighw@softtech.co.nz">leighw@softtech.co.nz</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div><font color="#0000ff" face="Arial" size="2"><span>Any
article related to what you said?</span></font></div>
<div><font color="#0000ff" face="Arial" size="2"><span></span></font> </div>
<div><font color="#0000ff" face="Arial" size="2"><span>TIA</span></font></div>
<div><font color="#0000ff" face="Arial" size="2"><span></span></font> </div>
<div><font color="#0000ff" face="Arial" size="2"><span>Regards</span></font></div><span class="sg">
<div><font color="#0000ff" face="Arial" size="2"><span>Leigh</span></font></div></span><span class="q">
<blockquote>
<div dir="ltr" align="left"><font face="Tahoma" size="2">-----Original Message-----<br><b>From:</b> <a href="mailto:delphi-bounces@delphi.org.nz" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">delphi-bounces@delphi.org.nz
</a>
[mailto:<a href="mailto:delphi-bounces@delphi.org.nz" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">delphi-bounces@delphi.org.nz</a>]<b>On Behalf Of </b>Kyley
Harris<br><b>Sent:</b> Monday, November 05, 2007 4:24 PM<br><b>To:</b> NZ
Borland Developers Group - Delphi List<br><b>Subject:</b> Re: [DUG] XP,
hyperthreading and speed<br><br></font></div>Its been proven long ago that
Hyperthreading slows down a delphi multi threaded app.. Any Server app I have
on a hyperthreaded machine can go 10 times faster if I force it to use only 1
cpu from the task manager. something to do with Context switching in the app..
I don't know how this would be under the new dual cores.. that was P4
architecture. </blockquote></span></div>
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