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https://issues.apache.org/struts/browse/WW-2808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44736#action_44736
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Philip Luppens commented on WW-2808:
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I decided to do some quick profiling myself since I have multiple apps hitting
production in the following months. I've created a minimalistic setup and put
some Apache Bench runs against it. Note: I haven't optimized anything other
than the Struts 2 recommendations, standard JVM settings, etc etc .. the point
is the relative performance, not the absolute one.
Results are as I remembered from some time ago. If I stick to non-form tags, I
can easily get approx. 1000req/s with a concurrency of 40 users (but with maxed
CPU), but as soon as there are form tags in play, performance goes down the
drain and we end up with a max of 150req/s.
Some quick profiling shows that indeed (esp) Freemarker and OGNL are to blame.
Even with full caching enabled for Freemarker, it seems to hit some serious
walls here - which kind of surprised me, since I've used Freemarker for a long
time (as a template view layer) and never had performance issues with it.
I'm now checking out Don's pure Java tags (he reported improvements up to 4x)
to see if we can get a more performant result. Other tag solutions like GXP and
Groovy will also be investigated.
> Performance issue Struts 2 Tag
> ------------------------------
>
> Key: WW-2808
> URL: https://issues.apache.org/struts/browse/WW-2808
> Project: Struts 2
> Issue Type: Improvement
> Components: Value Stack
> Affects Versions: 2.0.11.2
> Environment: Solaris , Weblogic 9.2 MP 1 ,Sun One Web Server 6.5
> Strut2 , Spring 2.5 and Sitemesh
> Reporter: sajan
> Priority: Critical
>
> There is huge performance issue and CPU hogging with Struts2 tag , this was
> observed while rendering JSP. These are some performance results obtained
> Strut 2 Tag - With all performance tuning applied as per Struts 2
> documentation - Freemarker caching etc...
> Load Runner Tool
> 40 users
> 900 hits per second
> 10 transaction per second
> Results
> CPU utilization 90%
> Response 3.5 sec
> Replaced some of Struts2 Tag , with Custom JSP Tags like (s:label,
> s:text,s:textfield,s:hidden,s:param)
> 40 users
> 900 hits per second
> 15 transaction per second
> Results
> CPU utilization 70%
> Response 2.0 sec
> Some where down the line Struts 2 tag are very cpu hungry , to people to
> adopt to strut2 framework cpu utilization should be optimized .
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