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From: Maxim Borkunov <Maxim.Borkunov@bridge-quest.com>
To: "dev@cocoon.apache.org" <dev@cocoon.apache.org>
Date: Wed, 18 Nov 2009 11:42:13 -0500
Subject: Flow script performance issue
Thread-Topic: Flow script performance issue
Thread-Index: AcpobhSx6B8KjcF8TQqCtEDN7KsNAg==
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Hi everyone,

I am using lenya 2.0.2 (cocoon-2.1.12-dev) and I made some performance test=
s with jmeter utility. 50 users in the same time walking through a lenya si=
te - that's my jmeter setup.
Unfortunatly, I found a bottleneck. The users (jmeter threads) freeze for a=
 long time at pages that uses flow scripts. Almost all web server socket li=
stener threads at this time shows the point listed below:

Thread [SocketListener0-24] (Suspended)
            FOM_JavaScriptInterpreter.setupContext(Redirector, Context, FOM=
_JavaScriptInterpreter$ThreadScope) line: 571
            FOM_JavaScriptInterpreter.callFunction(String, List, Redirector=
) line: 718
            CallFunctionNode.invoke(Environment, InvokeContext) line: 139
            MatchNode(AbstractParentProcessingNode).invokeNodes(ProcessingN=
ode[], Environment, InvokeContext, String, Map) line: 47
            MatchNode.invoke(Environment, InvokeContext) line: 108
            PipelineNode(AbstractParentProcessingNode).invokeNodes(Processi=
ngNode[], Environment, InvokeContext) line: 69
            PipelineNode.invoke(Environment, InvokeContext) line: 143
            PipelinesNode(AbstractParentProcessingNode).invokeNodes(Process=
ingNode[], Environment, InvokeContext) line: 69
            PipelinesNode.invoke(Environment, InvokeContext) line: 93
            ConcreteTreeProcessor.process(Environment, InvokeContext) line:=
 235
            ConcreteTreeProcessor.process(Environment) line: 177
            TreeProcessor.process(Environment) line: 254
            MountNode.invoke(Environment, InvokeContext) line: 118
            MatchNode(AbstractParentProcessingNode).invokeNodes(ProcessingN=
ode[], Environment, InvokeContext, String, Map) line: 47
            MatchNode.invoke(Environment, InvokeContext) line: 108
            PipelineNode(AbstractParentProcessingNode).invokeNodes(Processi=
ngNode[], Environment, InvokeContext) line: 69
            PipelineNode.invoke(Environment, InvokeContext) line: 143
            PipelinesNode(AbstractParentProcessingNode).invokeNodes(Process=
ingNode[], Environment, InvokeContext) line: 69
            PipelinesNode.invoke(Environment, InvokeContext) line: 93
            ConcreteTreeProcessor.process(Environment, InvokeContext) line:=
 235
            ConcreteTreeProcessor.process(Environment) line: 177
            TreeProcessor.process(Environment) line: 254
            Cocoon.process(Environment) line: 699
            CocoonServlet.service(HttpServletRequest, HttpServletResponse) =
line: 1154
            CocoonServlet(HttpServlet).service(ServletRequest, ServletRespo=
nse) line: 689
            ServletHolder.handle(ServletRequest, ServletResponse) line: 427
            WebApplicationHandler.dispatch(String, HttpServletRequest, Http=
ServletResponse, ServletHolder, int) line: 475
            WebApplicationHandler(ServletHandler).handle(String, String, Ht=
tpRequest, HttpResponse) line: 567
            PlusWebAppContext(HttpContext).handle(String, String, HttpReque=
st, HttpResponse) line: 1565
            PlusWebAppContext(WebApplicationContext).handle(String, String,=
 HttpRequest, HttpResponse) line: 635
            PlusWebAppContext(HttpContext).handle(HttpRequest, HttpResponse=
) line: 1517
            PlusWebAppContext.handle(HttpRequest, HttpResponse) line: 158
            Server(HttpServer).service(HttpRequest, HttpResponse) line: 954
            HttpConnection.service(HttpRequest, HttpResponse) line: 814
            HttpConnection.handleNext() line: 981
            HttpConnection.handle() line: 831
            SocketListener.handleConnection(Socket) line: 244
            SocketListener(ThreadedServer).handle(Object) line: 357
            ThreadPool$PoolThread.run() line: 534


Is that synchronization in the org.apache.cocoon.components.flow.javascript=
.fom.FOM_JavaScriptInterpreter class important?
Could you please advise how can I solve this performance problem?

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<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>Hi everyone,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>I am using lenya 2.0.2 (cocoon-2.1.12-dev) and I =
made
some performance tests with jmeter utility. 50 users in the same time walki=
ng
through a lenya site - that's my jmeter setup.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>Unfortunatly, I found a bottleneck. The users (jm=
eter
threads) freeze for a long time at pages that uses flow scripts. Almost all=
 web
server socket listener threads at this time shows the point listed below:<o=
:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>Thread [SocketListener0-24] (Suspended)=9A=9A=9A=
=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A FOM_JavaScriptI=
nterpreter.setupContext(Redirector,
Context, FOM_JavaScriptInterpreter$ThreadScope) line: 571=9A <o:p></o:p></s=
pan></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A FOM_JavaScriptI=
nterpreter.callFunction(String,
List, Redirector) line: 718 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A CallFunctionNod=
e.invoke(Environment,
InvokeContext) line: 139=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A MatchNode(Abstr=
actParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext, String, Map) line: 47 <o:p></o:p></span></font>=
</p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A MatchNode.invok=
e(Environment,
InvokeContext) line: 108 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelineNode(Ab=
stractParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext) line: 69=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p>=
</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelineNode.in=
voke(Environment,
InvokeContext) line: 143=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></fon=
t></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelinesNode(A=
bstractParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext) line: 69=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p>=
</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelinesNode.i=
nvoke(Environment,
InvokeContext) line: 93=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font=
></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ConcreteTreePro=
cessor.process(Environment,
InvokeContext) line: 235=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ConcreteTreePro=
cessor.process(Environment)
line: 177=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A TreeProcessor.p=
rocess(Environment) line:
254=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A MountNode.invok=
e(Environment,
InvokeContext) line: 118 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A MatchNode(Abstr=
actParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext, String, Map) line: 47 <o:p></o:p></span></font>=
</p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A MatchNode.invok=
e(Environment,
InvokeContext) line: 108 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelineNode(Ab=
stractParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext) line: 69=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p>=
</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelineNode.in=
voke(Environment,
InvokeContext) line: 143=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></fon=
t></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelinesNode(A=
bstractParentProcessingNode).invokeNodes(ProcessingNode[],
Environment, InvokeContext) line: 69=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p>=
</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PipelinesNode.i=
nvoke(Environment,
InvokeContext) line: 93=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font=
></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ConcreteTreePro=
cessor.process(Environment,
InvokeContext) line: 235=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ConcreteTreePro=
cessor.process(Environment)
line: 177=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A TreeProcessor.p=
rocess(Environment) line:
254=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A Cocoon.process(=
Environment) line: 699=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A CocoonServlet.s=
ervice(HttpServletRequest,
HttpServletResponse) line: 1154=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span><=
/font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A CocoonServlet(H=
ttpServlet).service(ServletRequest,
ServletResponse) line: 689=9A=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ServletHolder.h=
andle(ServletRequest,
ServletResponse) line: 427 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A WebApplicationH=
andler.dispatch(String,
HttpServletRequest, HttpServletResponse, ServletHolder, int) line: 475=9A=
=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A WebApplicationH=
andler(ServletHandler).handle(String,
String, HttpRequest, HttpResponse) line: 567=9A=9A=9A=9A=9A=9A=9A=9A <o:p><=
/o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PlusWebAppConte=
xt(HttpContext).handle(String,
String, HttpRequest, HttpResponse) line: 1565=9A=9A <o:p></o:p></span></fon=
t></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PlusWebAppConte=
xt(WebApplicationContext).handle(String,
String, HttpRequest, HttpResponse) line: 635=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PlusWebAppConte=
xt(HttpContext).handle(HttpRequest,
HttpResponse) line: 1517=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span=
></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A PlusWebAppConte=
xt.handle(HttpRequest,
HttpResponse) line: 158=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font></=
p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A Server(HttpServ=
er).service(HttpRequest,
HttpResponse) line: 954 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A HttpConnection.=
service(HttpRequest,
HttpResponse) line: 814=9A=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A HttpConnection.=
handleNext() line: 981=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A HttpConnection.=
handle() line: 831=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A SocketListener.=
handleConnection(Socket)
line: 244=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A SocketListener(=
ThreadedServer).handle(Object)
line: 357 <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A ThreadPool$Pool=
Thread.run() line: 534=9A=9A=9A <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A=9A <o:p></o:p></sp=
an></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>Is that synchronization in the
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter
class important?<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US style=
=3D'font-size:
10.0pt;font-family:Arial'>Could you please advise how can I solve this
performance problem?<o:p></o:p></span></font></p>

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