Dear All,
Thanks very much for useful help.
Just fight with this for 24 hours and get some improvement.
I want to apology first because I am so stupid. Last evening I do a
profiling again. The OGNL is not the main bottleneck, but it is still a
problem.
My previous page loading is around 3-5 seconds. Now it is around 1-2
seconds.
First of all, when I saw Vlad's email, I copy out the template and delete
the original from struts-core.jar. It looks well (but I forget to compare
the timing, later i will do it again)
Then I rewrite the page again and enable the DEBUG in log4j to trace it.
Something what I found:
struts.configuration.xml.reload: this parameter in the properties file will
give another 0.3 second to loading time in my case (it is so bad, that I
think it should be mentioned in the document that this feature should be
disabled in production, because you know, in struts.properties of showcase,
it is enabled.).
There is a list in my page, which includes around 800+ items, I want to show
them in a select list. Previously I get it from database by Hibernate and
directly pass it to the component, this will cause 1 second to finish
construct this select component.
<s:select
list="prodList"
multiple="true"
listKey="idkey"
listValue="prodName"
/>
Now I loop it in the class and convert it into a Map<String, String>, then
pass the map to the select, it get around 1 second faster.
Regards,
Zheng Shuai
On 2/26/07, Vlad2006 <[EMAIL PROTECTED]> wrote:
Hi Zheng,
Have you profiled your application? Are you sure it is OGNL that makes
your
application slow?
From my experience it is not so slow. At least I have not found it too be
a
bottleneck in my application. Not yet :-).
What is really slow in WebWork/Struts2 is jsp tags like, textfield, radio,
anchor, and other which are using FreeMarker templates.
If it is your case, you could make it faster, you have to extract
templates
out of webwork.jar (in your case probably struts.jar) and put them in, for
example, WEB-INF/templates directory.
There is a page on WebWork Wiki about it:
http://wiki.opensymphony.com/display/WW/Performance+Tuning
I am not using Struts2 yet, but I believe most of the tips will work for
Struts2.
One more thing that could make application slower is when resource bundles
are constantly reloaded. It is good for dev but not acceptable for
production. Check in struts property like: webwork.i18n.reload=false
Best regards
Vlad
Shuai Zheng wrote:
>
> Dear All,
>
> I am using struts 2.0.6, but honestly the performance is very bad (not
> need
> to think about scalability), to speed to load a simple page is much
slower
> than pure JSP (I haven't compared with struts 1). To refresh one page it
> is
> 3-5 seconds with only one user. The profiler tells me the OGNL is the
> bottleneck.
>
> I notice that there are some complains on OGNL about the performance
> already, may I know any other way to replace OGNL with anything else to
> get
> a faster speed? Currently the speed is not acceptable for production.
>
> Regards,
>
> Zheng Shuai
>
>
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