« Return to Thread: [jira] [Created] (VELOCITY-812) Parser.jj_scan_token very slow during debugging

[jira] [Commented] (VELOCITY-812) Parser.jj_scan_token very slow during debugging

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[ https://issues.apache.org/jira/browse/VELOCITY-812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13109616#comment-13109616 ]

Konstantinos Kougios commented on VELOCITY-812:
-----------------------------------------------

just compiled the parser by using javacc v5 and running
ant -Djavacc.home=..../javacc-5.0 parser

The Parser class contains the same line of code that throws an exception (used as control structure and not as a real error)

I tried to give it a go anyway, but velocity doesn't compile, JJParserState is not generated by javacc anymore:

mvn clean -DskipTests=true package
...
[ERROR] /home/ariskk/temp/t/1.7/src/java/org/apache/velocity/runtime/parser/JJTParserState.java:[5,25] error: cannot find symbol
[ERROR] class JJTParserState
[ERROR] /home/ariskk/temp/t/1.7/src/java/org/apache/velocity/runtime/parser/JJTParserState.java:[37,9] error: cannot find symbol
[ERROR] class JJTParserState
[ERROR] /home/ariskk/temp/t/1.7/src/java/org/apache/velocity/runtime/parser/JJTParserState.java:[42,23] error: cannot find symbol
[ERROR] class JJTParserState
...

> 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
> 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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« Return to Thread: [jira] [Created] (VELOCITY-812) Parser.jj_scan_token very slow during debugging