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https://issues.apache.org/jira/browse/XBEAN-208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13432151#comment-13432151
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Jarek Gawor commented on XBEAN-208:
-----------------------------------
Committed performance improvements in revision 1371482.
Resource lookups (getResource()) are now cached in LRU cache. The default cache
is of size 250. That size can be changed via a system property:
org.apache.xbean.osgi.bundle.util.DelegatingBundle.resourceCacheSize. If the
system property is set to -1 (or less then 0) then no caching will be done.
For class loading (loadClass()), the DelegatingBundle will now build package to
bundle mapping which will be used to quickly lookup a bundle from which to load
a class from a given package.
> DelegatingBundle performance issues
> -----------------------------------
>
> Key: XBEAN-208
> URL: https://issues.apache.org/jira/browse/XBEAN-208
> Project: XBean
> Issue Type: Improvement
> Components: bundleutils
> Affects Versions: 3.11
> Reporter: Jarek Gawor
> Assignee: Jarek Gawor
>
> DelegatingBundle suffers from some performance issues when loading classes or
> looking up resources.
> The getResource() can be slow because each lookup can cause a lookup on each
> bundle that DelegatingBundle delegates to.
> The loadClass() can be slow for the same reason as getResource() and because
> PackageAdmin (which can be very slow) is used to lookup a bundle for a given
> package.
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