[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2867) HIbernate reflection optimization with javassist MUCH slower than in previous versions with cglib

[Steve Ebersole (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28353 ] 

Steve Ebersole commented on HHH-2867:
-------------------------------------

plus you make no attempt to "prime" your jvm, nor isolate each measurement in terms of gc from the other measurements etc.

> HIbernate reflection optimization with javassist MUCH slower than in previous versions with cglib
> -------------------------------------------------------------------------------------------------
>
>                 Key: HHH-2867
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2867
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.3
>            Reporter: MG
>         Attachments: ReflectionTest.java
>
>
> Hibernate reflection optimization with javassist MUCH slower than in previous versions with cglib,
> and there is no way to set it to use cglib anymore
> I'm setting 
> hibernate.bytecode.provider=cglib
> in hibernate.properties 
> but it is still using javassist
>      [java] 10:42:00,675 INFO  [Version] Hibernate Annotations 3.2.1.GA
>      [java] 10:42:00,722 INFO  [Environment] Hibernate 3.2.3
>      [java] 10:42:00,737 INFO  [Environment] loaded properties from resource hibernate.properties: {hibernate.jdbc.use_streams_for_binary=fal
> se, hibernate.bytecode.use_reflection_optimizer=true, hibernate.bytecode.provider=cglib}
>      [java] 10:42:00,737 INFO  [Environment] using bytecode reflection optimizer
>      [java] 10:42:00,737 INFO  [Environment] Bytecode provider name : javassist
>      [java] 10:42:00,753 INFO  [Environment] using JDK 1.4 java.sql.Timestamp handling
> Please, check sample code in
> http://jira.jboss.com/jira/browse/JBSEAM-1977
> which compares cglib with javassist optimizations
> cglib beats JDK 5 reflection almost 10 times
> javassist performs even slower than JDK 5 reflection

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