Parser.jj_scan_token very slow during debugging
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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
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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