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https://issues.apache.org/jira/browse/WW-3467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889056#action_12889056
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Lukasz Lenart commented on WW-3467:
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It can be, I was looking into FreemarkerTemplateEngine when this issue was
registered and it looks like cache was enabled for FTE itself to cache loaded
FTL template files.
> Improve performance for page rendering by refactoring freemarker cache
> ----------------------------------------------------------------------
>
> Key: WW-3467
> URL: https://issues.apache.org/jira/browse/WW-3467
> Project: Struts 2
> Issue Type: Improvement
> Affects Versions: 2.1.5, 2.1.6, 2.1.8, 2.1.8.1
> Reporter: zhouyanming
> Priority: Blocker
> Attachments: patch.txt
>
>
> currently,struts2 have two inconsistent options about freemarker cache
> 1.<constant name="struts.freemarker.mru.max.strong.size" value="250" />
> this option will used by freemarker.cache.MruCacheStorage
> 2.<constant name="struts.freemarker.templatesCache" value="true" />
> this option will use a internal ConcurrentHashMap in FreemarkerTemplateEngine
> but not freemarker native cache
> my patch deprecated this option and clean those code
> also add a option to change default update cache interval (5 seconds)
> <constant name="struts.freemarker.templatesCache.updateDelay" value="1800" />
> BTW:set devMode to true will disable cache and update immediately
> using cache will boost great performance, reduce 400ms to 20ms render a xhtml
> theme form and some textfield in my test .
> I think https://issues.apache.org/jira/browse/WW-2808 could closed by adding
> a wiki page about how to use freemarker cache
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