Performance of RichFaces Filter and ui.pack.js

[iradix]

I've recently started to profile two different JSF/Richfaces application using the New Relic profiler.  Strangely, what I've found is the only resource that often takes more than 200ms to generate is the richfaces ui.pack.js file.  A majority of the requests are fine, the average load time is around 100ms, but a small number are taking an unexpectedly long time.  I couldn't tell you the number of times that specific file is requested but the larger of the two site averages around 50,000 page views a day and in the last 3 hours there have been about 40 requests for the ui.pack.js file that have taken longer than 2 seconds, 12 of those requests have taken longer then 30 seconds and the 3 longest took just over 2 minutes.  I've tried to correlate the slow loads with cpu spikes or garbage collections and there doesn't seem to be a relation.  I also don't see any other resources that are loading slower when it happens.  Unfortunately part of being a "low impact" profiler means that the new relic tool only instruments certain classes, like ServletFilters, so the deepest level I can track the issue to is the org.ajax4jsf.Filter.doFilter()  or a non filter method executing within it.  I'm using Richface 3.3.2.SR1 with one application and 3.3.1.GA with the other and both are deployed to completely separate servers.  The configuration that I think would be relevant is the same for both:

In web.xml

<context-param>

<param-name>org.richfaces.LoadStyleStrategy</param-name>

<param-value>ALL</param-value>

</context-param>

<context-param>

<param-name>org.richfaces.LoadScriptStrategy</param-name>

<param-value>ALL</param-value>

</context-param>

<context-param>

<param-name>org.ajax4jsf.COMPRESS_SCRIPT</param-name>

<param-value>false</param-value>

</context-param>

<context-param>

<param-name>org.richfaces.LoadStyleStrategy</param-name>

<param-value>ALL</param-value>

</context-param>

<context-param>

<param-name>org.richfaces.LoadScriptStrategy</param-name>

<param-value>ALL</param-value>

</context-param>

<context-param>

<param-name>org.ajax4jsf.COMPRESS_SCRIPT</param-name>

<param-value>false</param-value>

</context-param>

In Seam components.xml

<web:ajax4jsf-filter enable-cache="true" force-parser="false"/>

I see that there is some locking that happens within RichFaces when resources are generated, could that be the cause?  Has anyone else ever seen an issue like this?

[dcernahoschi]

I've observed the same problem too. RF 3.3.3. Did you mange to solve the issue?

[iradix]

Yup.  Or at least I don't see issues like this any more since I stopped using JSF and move all of our projects to Lift.

[dcernahoschi]

Good move. I'm planning something similar for the next year.

Thank you.