<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Comic Sans MS";
panose-1:3 15 7 2 3 3 2 2 2 4;}
@font-face
{font-family:"MS Sans Serif";}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"MS Sans Serif";
color:black;
mso-believe-normal-left:yes;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"MS Sans Serif";
color:black;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Comic Sans MS";
color:#9933FF;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1213924477;
mso-list-type:hybrid;
mso-list-template-ids:1425019612 -1991077624 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Comic Sans MS";
mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Courier New";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><![if mso 9]><style>p.MsoNormal
{margin-left:37.5pt;}
</style><![endif]><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body bgcolor=white background="cid:image001.jpg@01CC0413.81F29430" lang=EN-US link=blue vlink=purple style='margin-left:37.5pt'><img src="cid:image001.jpg@01CC0413.81F29430" v:src="cid:image001.jpg@01CC0413.81F29430" v:shapes="_x0000_Mail" width=0 height=0 class=shape style='display:none;width:0;height:0'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Hello All,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>I’m working at HP Software R&D and we are considering using drools in our product.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Benchmarking tests showed that running 10,000 rules consumes 382mb. <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>This is too high for our system requirements, and we would like to know how we can improve it.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Technical details:<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:"Comic Sans MS";color:#9933FF'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-family:"Comic Sans MS";color:#9933FF'>Drools version: 5.1 with default configuration. <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:"Comic Sans MS";color:#9933FF'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-family:"Comic Sans MS";color:#9933FF'>All rules look like this:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>rule "status-Fixed-Open"<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> when<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> event : FieldChangedEvent(fieldName == "status", oldValue == "Fixed");<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> entity : Entity(entityType == "mock-entity");<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> eval(((String) entity.getFieldValue("status")).equals("Open"));<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> then <o:p></o:p></span></p><p class=MsoNormal style='margin-left:75.0pt'><span style='font-family:"Comic Sans MS";color:#9933FF'> do Something…<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>end <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:"Comic Sans MS";color:#9933FF'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-family:"Comic Sans MS";color:#9933FF'>Loading code:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>KnowledgeBuilder knowledgeBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>for(all resources)<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>{<o:p></o:p></span></p><p class=MsoNormal style='margin-left:37.5pt;text-indent:34.5pt'><span style='font-family:"Comic Sans MS";color:#9933FF'>knowledgeBuilder.add(resource, ResourceType.DRL);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>}<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Any insights are most appreciated.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Thank You,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'>Liron, HP Software R&D<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:#9933FF'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#9933FF'><o:p> </o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>