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https://issues.apache.org/jira/browse/SLING-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653242#action_12653242
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Carsten Ziegeler commented on SLING-756:
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Not sure if this is the problem, but I think resolving has improved in the
latest Felix releases, so upgrading to 1.4.x might already make a difference
> Bundle startup becomes very slow with many bundles present
> ----------------------------------------------------------
>
> Key: SLING-756
> URL: https://issues.apache.org/jira/browse/SLING-756
> Project: Sling
> Issue Type: Bug
> Components: JCR Install
> Reporter: Bertrand Delacretaz
>
> When running the jcrinstall integration tests with a few hundreds of very
> simple bundles, the bundle.start call in the BundleResourceProcessor class
> becomes very slow. With a few bundles it takes only a few milliseconds, and
> goes up to the 500 msec range with about 500 installed bundles.
> Seems like most of that time is spent in the Felix
> R4SearchPolicyCore.resolve() method, but I haven't investigated that in
> detail yet.
> To reproduce, run "mvn clean install" in extensions/jcrinstall/testing, with
> these parameters:
> -D sling.test.scale.factor = 20
> -D sling.test.bundles.wait.seconds = 200
> With these values, the StopAndChangeBundlesTest installs 140 bundles by
> copying them into the repository, disables jcrinstall, replaces the bundles
> with 260 new ones and reactivates jcrinstall.
> When reactivated, jcrinstall uninistalls the 140 bundles and then installs
> and starts the 260 new ones - this is when the bundle.start becomes very slow.
> All bundles are clones of the extensions/jcrinstall/testbundles/observer
> bundle, same code but unique bundle symbolic name and name. This causes
> warnings from the Felix framework as all bundle clones contain a component
> with the same name. I don't think that's related to the long start time
> though.
> As it seems like the problem has to do with resolving the bundle, here are
> the package exports/imports of the test bundle:
> exports: none
> imports:
> javax.jcr,version=1.0.0 from org.apache.sling.jcr.api (16)
> javax.jcr.observation,version=1.0.0 from org.apache.sling.jcr.api (16)
> org.apache.sling.jcr.api,version=2.0.3.incubator-SNAPSHOT from
> org.apache.sling.jcr.api (16)
> org.osgi.framework,version=1.4.0 from System Bundle (0)
> org.osgi.service.component,version=1.0.0 from System Bundle (0)
> org.slf4j,version=1.5.2 from org.apache.sling.commons.log (19)
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