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https://issues.apache.org/jira/browse/OWB-1382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17308798#comment-17308798
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Romain Manni-Bucau commented on OWB-1382:
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Hmm, reviewed a bit your example app and I think we can maybe improve things
but didn't get a lot of luck in terms of perf on my computer so if you can test
on your actual instance it would help:
# hardcode the bean manager injection for observer methods (extensions), patch
can look like
[https://gist.github.com/rmannibucau/bf562cd3f4fc44593fc05ad3c710502d] (boost
is not impressive there so not sure it makes sense)
# skip validations which bother you: add
"_org.apache.webbeans.spi.deployer.skipValidations=true"_ in owb config - in
openwebbeans.properties if you prefer.
Perf diff is not impressive but seems to fix what you describe as behavior (I
still have most of the startup lost time in tomcat tld/jar scanning until it is
configured to be skipped and myfaces bytecode instrumentation after deployment
validation).
> Class javax.enterprise.inject.spi.BeanManager not cached on start
> -----------------------------------------------------------------
>
> Key: OWB-1382
> URL: https://issues.apache.org/jira/browse/OWB-1382
> Project: OpenWebBeans
> Issue Type: Improvement
> Components: Context and Scopes
> Reporter: Vladimir Dvorak
> Priority: Minor
>
> Class javax.enterprise.inject.spi.BeanManager generates a lot of full lookups
> (tens of thousands) in InjectionResolver.implResolveByType() when OWB is
> starting even in simple project. It looks that OWB starts could be improved
> by 10-20% by introducing caching. I'm trying to put cache in BeanImpl as is
> shown there:
>
> [https://github.com/skybber/pf-expensive-converter/blob/main/addhoc/org/apache/webbeans/container/InjectionResolver.java#L491]
>
> it skips expensive iteration over all beans and improves start of OWB, in my
> case from 10.5s to 9.9s. Probably there is better way how to do it, since the
> problem is only with the class javax.enterprise.inject.spi.BeanManager.
>
>
>
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