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From "Vinay Shankar (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KARAF-5314) The performance of profile builder used by karaf maven plugin has reduced significantly in 4.1 compared to 4.0
Date Fri, 18 Aug 2017 13:37:00 GMT
Vinay Shankar created KARAF-5314:
------------------------------------

             Summary: The performance of profile builder used by karaf maven plugin has reduced
significantly in 4.1 compared to 4.0
                 Key: KARAF-5314
                 URL: https://issues.apache.org/jira/browse/KARAF-5314
             Project: Karaf
          Issue Type: Bug
            Reporter: Vinay Shankar
             Fix For: 4.1.3


The performance of profile builder used by karaf maven plugin has reduced significantly in
4.1 compared to 4.0. 
The java streams API is being used in 4.1 to filter our the required features from the set
of all features present in the repositories that are part of the profile. This is done in
the "addFeatures" method in the "Builder.java" class in the "org.apache.karaf.profile.core"
bundle. This change (from 4.0) has drastically reduced the performance. For a profile with
~900 features in all the repositories in the profile and ~300 required features from a highly
complex feature dependency tree, this function is taking around 13min to complete. The same
execution took around 3-5min in 4.0 (where simple for loops were being used). 



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