In an attempt to find out where all the CPU cycles go I ran JProfiler against a
request for a Struts 2 page containing a form with around 40 tags running under
Tomcat 5.5, using SiteMesh for styling.
The details are below, but FreeMarker seems to be the primary guilty party.
Does anyone know how to get it to go faster, I already have the
freemarker.properties file in WEB-INF/classes.
For those that are interested, the details.
Around 7% went to Tomcat and 4% to SiteMesh.
100.0% - 2,215 ms - 1 inv.
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
99.5% - 2,205 ms - 8 inv. ptv.http.HttpRequestInitialiserFilter.doFilter
99.5% - 2,205 ms - 8 inv. ptv.http.HttpRequestInitialiserFilter.doFilter
94.0% - 2,082 ms - 8 inv. javax.servlet.FilterChain.doFilter
94.0% - 2,081 ms - 8 inv.
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter
92.6% - 2,051 ms - 3 inv.
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage
90.3% - 1,999 ms - 3 inv. javax.servlet.FilterChain.doFilter
88.9% - 1,969 ms - 3 inv.
com.opensymphony.xwork2.DefaultActionInvocation.invoke
Then about 4% went to the Struts 2 Interceptor stack. Of the remaining 85%,
OGNL took about 15% (I estimate, all in) but the vast majority went to
Freemarker; 67% consumed to render the tags.
84.8% 1,878 ms - 1 inv. /pages/vdp/rights/viewRight.jsp
[org.apache.jsp.pages.vdp.rights.viewRight_jsp]
67.2% - 1,488 ms - 23 inv. freemarker.template.Template.process
7.7% - 171 ms - 95 inv.
com.opensymphony.xwork2.util.OgnlValueStack.findValue(java.lang.String)
4.2% - 94,134 µs - 108 inv.
com.opensymphony.xwork2.util.TextParseUtil.translateVariables
2.0% - 45,152 µs - 65 inv.
com.opensymphony.xwork2.util.OgnlValueStack.findValue(java.lang.String,
java.lang.Class)
0.8% - 17,987 µs - 92 inv. com.opensymphony.xwork2.inject.ContainerImpl.inject
0.3% - 6,119 µs - 63 inv. com.opensymphony.xwork2.util.TextUtils.htmlEncode
0.2% - 4,390 µs - 23 inv. freemarker.template.SimpleHash.putAll
0.2% - 3,542 µs - 384 inv. ognl.OgnlContext.get
I could find no particularly guilty party in FreeMarker, it just seemed to
whittle the CPU away. Some of it went to OGNL, but not much.
67.0% - 1,485 ms - 23 inv. freemarker.core.Environment.process
66.9% - 1,482 ms - 23 inv. freemarker.core.Environment.visit
66.9% - 1,482 ms - 23 inv. freemarker.core.MixedContent.accept
66.9% - 1,481 ms - 108 inv. freemarker.core.Environment.visit
62.0% - 1,374 ms - 59 inv. freemarker.core.Include.accept
57.8% - 1,280 ms - 59 inv. freemarker.core.Environment.include
57.7% - 1,277 ms - 59 inv. freemarker.core.Environment.visit
57.6% - 1,276 ms - 59 inv. freemarker.core.MixedContent.accept
57.4% - 1,271 ms - 504 inv. freemarker.core.Environment.visit
23.7% - 525 ms - 49 inv. freemarker.core.Include.accept
16.0% - 353 ms - 4 inv. freemarker.core.UnifiedCall.accept
13.8% - 306 ms - 192 inv. freemarker.core.ConditionalBlock.accept
1.7% - 37,064 µs - 40 inv. freemarker.core.DollarVariable.accept
1.6% - 35,617 µs - 2 inv. freemarker.core.IfBlock.accept
0.2% - 4,826 µs - 504 inv. freemarker.core.Environment.popElement
0.1% - 2,696 µs - 504 inv. freemarker.core.Environment.pushElement
0.1% - 1,513 µs - 155 inv. freemarker.core.TextBlock.accept
0.0% - 108 µs - 61 inv. freemarker.core.Comment.accept
0.0% - 36 µs - 1 inv. freemarker.core.PropertySetting.accept
Matthew Seaborn
Software Architect
t +44(0) 208 484 0729
m +44(0) 7949 465 142
e [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
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