[jira] [Resolved] (FOP-2314) Caching xmlParserClassName in org.apache.fop.svg.SimpleSVGUserAgent

[Luis Bernardo (JIRA)]

     [ 
https://issues.apache.org/jira/browse/FOP-2314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Luis Bernardo resolved FOP-2314.
--------------------------------

       Resolution: Implemented
    Fix Version/s: trunk

the "tiger" example (example/fo/svg/embedding.fo) runs 10% faster with this 
change.

patch applied: http://svn.apache.org/viewvc?view=revision&revision=1544897

> Caching xmlParserClassName in org.apache.fop.svg.SimpleSVGUserAgent
> -------------------------------------------------------------------
>
>                 Key: FOP-2314
>                 URL: https://issues.apache.org/jira/browse/FOP-2314
>             Project: Fop
>          Issue Type: Improvement
>          Components: svg
>    Affects Versions: trunk
>         Environment: Tested on Mac OSX 10.9, Java SE 7 (1.7.0_04)
>            Reporter: Gonzalo Vasquez
>            Priority: Minor
>              Labels: performance
>             Fix For: trunk
>
>         Attachments: SimpleSVGUserAgent.java.patch, sample.fo
>
>
> After having profiled an application I'm coding, and having detected hotspot 
> methods, I've come across with a few suggestions por performance improvement 
> which actually have worked in my environment.
> Changing the referenced method to the following code makes the small trick:
> From:
>     public String getXMLParserClassName() {
>         try {
>             SAXParserFactory factory = SAXParserFactory.newInstance();
>             return factory.newSAXParser().getXMLReader().getClass().getName();
>         } catch (Exception e) {
>             return null;
>         }
>     }
> To:
>     private static final String xmlParserClassName;
>     static {
>         String result;
>         try {
>             SAXParserFactory factory = SAXParserFactory.newInstance();
>             result = 
> factory.newSAXParser().getXMLReader().getClass().getName();
>         } catch (Exception e) {
>             result = null;
>         }
>         xmlParserClassName = result;
>     }
>     public String getXMLParserClassName() {
>         return xmlParserClassName;
>     }
> Could this be added as a patch to the trunk please?



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