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Posted to dev@velocity.apache.org by "Claude Brisson (JIRA)" <ji...@apache.org> on 2016/09/12 12:54:20 UTC
[jira] [Closed] (VELOCITY-812) Parser.jj_scan_token very slow
during debugging
[ https://issues.apache.org/jira/browse/VELOCITY-812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Claude Brisson closed VELOCITY-812.
-----------------------------------
Resolution: Invalid
Assignee: Claude Brisson
Fix Version/s: 2.x
Since it seems to be a javacc problem, we won't fix it here: we can't do more than upgrade javacc, which has been done (we're now using javacc 5.0).
> Parser.jj_scan_token very slow during debugging
> -----------------------------------------------
>
> Key: VELOCITY-812
> URL: https://issues.apache.org/jira/browse/VELOCITY-812
> Project: Velocity
> Issue Type: Bug
> Components: Engine
> Affects Versions: 1.7
> Environment: linux, windows, tomcat 6 running via maven, JDK7 (but had same issue with JDK6)
> Reporter: Konstantinos Kougios
> Assignee: Claude Brisson
> Fix For: 2.x
>
> Attachments: profile.png
>
>
> Parser.jj_scan_token runs very slowly during java debugging mode. I've allocated more than enough memory for Java (Xmx , Xss, PermGen) and made sure it is enough by monitoring via visualvm.
> I am working on a springframework mvc project, with velocity as the template engine. Spring has a macro file that is loaded during startup : spring.vm (10kb). My box (6 core phenom processor) takes 10 seconds to parse that macro. After profiling with visualvm, I found out that 9 secs are spend on jj_scan_token method.
> When running the project without debugging enabled, the parsing is very fast.
> Please note that the issue occurs without any customization of velocity properties. Typically though the properties look like this:
> springMacro.resource.loader.cache=true,
> resource.loader=[springMacro],
> velocimacro.library=org/springframework/web/servlet/view/velocity/spring.vm,
> output.encoding=UTF-8,
> input.encoding=UTF-8,
> springMacro.resource.loader.class=org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> Please note that I've tried removing the encoding, but still the problem persists.
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