[jbossseam-issues] [JBoss JIRA] Updated: (JBSEAM-2001) Use fast optimized API for reading annotations in Seam and Seam RHDS Tools
Mikhail Grushinskiy (JIRA)
jira-events at lists.jboss.org
Sun Sep 30 21:20:52 EDT 2007
[ http://jira.jboss.com/jira/browse/JBSEAM-2001?page=all ]
Mikhail Grushinskiy updated JBSEAM-2001:
----------------------------------------
Fix Version/s: 2.0.1.GA
> Use fast optimized API for reading annotations in Seam and Seam RHDS Tools
> --------------------------------------------------------------------------
>
> Key: JBSEAM-2001
> URL: http://jira.jboss.com/jira/browse/JBSEAM-2001
> Project: JBoss Seam
> Issue Type: Feature Request
> Components: Core
> Reporter: Mikhail Grushinskiy
> Fix For: 2.0.1.GA
>
>
> Use fast optimized API for reading annotations.
> Seam is using calls to isAnnotationPresent() very frequently and it impacts overall performance and throughput
> backport175 from
> http://backport175.codehaus.org/
> provides API for reading annotations faster than JDK5.
> (They claim in http://fisheye.codehaus.org/browse/backport175/backport175/src/main/org/codehaus/backport175/reader/bytecode/AnnotationReader.java
> as much as 5 times faster)
> Quote:
> // ===========================================================================
> // Implementation notes:
> // Parsing and annotation creation is made in two steps
> //
> // 1. The bytecode is parsed and the annotation content is put in elements,
> // which are stored for later processing
> //
> // 2. Upon annotation access the elements are processed and a dynamic proxy
> // for the annotation is created and cached.
> //
> // This gives much better performance than reflective access of Java 5
> // annotations (reflective access is around 5 times slower)
> // ===========================================================================
> Provide optimizations in Seam for faster annotation reading. Apart from Seam application performance it also can help Seam tools (in RHDS),
> as well as application startup time.
> This behavior can be made optional similarly to hibernate's hibernate.jdbc.use_refection_optimizer
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