Dmitry Konstantinov created FELIX-5247:
------------------------------------------
Summary: Reduce number of threads created by Resolver during a
startup of OSGi-based applications
Key: FELIX-5247
URL: https://issues.apache.org/jira/browse/FELIX-5247
Project: Felix
Issue Type: Improvement
Components: Framework, Resolver
Affects Versions: resolver-1.8.0, framework-5.4.0
Reporter: Dmitry Konstantinov
Thread creation is a quite expensive operation, so it make sense to reuse
threads in ResolverImpl if they are needed to split some task and do it in
parallel.
For example: Apache Karaf startup with several features can install about 300
bundles. If each one will create Runtime.getRuntime().availableProcessors()
threads - so, during a startup about 1000 threads will be created only by
Resolver (in case of a server machine even much more). Thread creation takes
let's say (depends on machine, JDK, OS, etc) about 10-20 ms, so we are spending
about 1-2 seconds of startup time only to create some threads.
it make sense to create a thread pool once (with a configurable thread number)
and reuse it for resolving of different bundles.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
