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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Maxim,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Depending on your use case you may be able to disable shadow
facts in your Drools 4 instance. See the manual on when it is ok/not-ok to
disable shadow facts. Based on your description it probably is acceptable for
your uses. Disabling shadow facts may improve your performance, the manual has
details.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>To disable shadow facts:<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:1.5in;text-autospace:none'><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> RuleBaseConfiguration
conf = </span><b><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055'>new</span></b><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> RuleBaseConfiguration();</span><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span
style='font-size:10.0pt;font-family:"Courier New"'>conf.setShadowProxy(false);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> base = RuleBaseFactory.<i>newRuleBase</i>(conf);</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Maxim Veksler<br>
<b>Sent:</b> Wednesday, November 19, 2008 8:36 AM<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> [rules-users] Drools 4 performs slower then Drools 3 - Help on
.drlfile adaptation<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Hello everyone,<br>
<br>
<br>
Please allow me to briefly describe how our system works:<br>
<br>
We use drools as an efficient matching layers - I have X rules, in the RHS of
each rule I have a mark for each rule to signal that it has passed in the
current context (There are by definition more then 1 contexts). After the first
fireAllRules() has finished, and I have the data structure that allows me to
query what rules have passed for each context I assert a "Marker"
object, that allows Drools to continue filtering only for these contexts that I
decide as valid to match attempts.<br>
<br>
The end result, is that I have 2 fireAllRules called with some java code in
between them.<br>
<br>
<br>
In drools3 for 3 contexts I got the following resutls :<br>
<br>
== Drools Section (Generic Call) : With default context settings, no HotSpot.<br>
RESULT:::::::: avg: 33.9023(ms) for 1555 calls<br>
<br>
Now in drools4 I'm getting the following:<br>
<br>
== Drools Section (Generic Call) : With default context settings, no HotSpot -
Drools 4<br>
RESULT:::::::: avg: 37.4356(ms) for 1467 calls<br>
<br clear=all>
<br>
<br>
As I increase the context's number I'm getting larger difference in results time.<br>
Please note that HotSpot is disabled just for the test, to not JIT
interference.<br>
<br>
I've disabled all evals in the drl files, to all is left is pure Drools syntax
and yet It seems that the system works slower.<br>
<br>
Please suggest what else I should be doing to optimize the drl files to work
efficiently with Drools 4 engine.<br>
<br>
<br>
Thank you,<br>
Maxim.<br>
<br>
-- <br>
Cheers, <br>
Maxim Veksler<br>
<br>
"Free as in Freedom" - Do u GNU ?<o:p></o:p></p>
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