[jira] [Created] (NETBEANS-2507) Slow Java code completion

["Anthony Vanelverdinghe (JIRA)" <ji...@apache.org>]

Anthony Vanelverdinghe created NETBEANS-2507:
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             Summary: Slow Java code completion
                 Key: NETBEANS-2507
                 URL: https://issues.apache.org/jira/browse/NETBEANS-2507
             Project: NetBeans
          Issue Type: Bug
            Reporter: Anthony Vanelverdinghe
         Attachments: selfsampler.npss

There are serious issues with code completion in recent NetBeans versions. Attached is a profiling snapshot: all I did was triggering autocompletion at "java.nio.file.Files.<cursor>"

Of the 2 "Code Completion" threads with the most CPU time:
 * one spends over 9 seconds in [FastJar::list|https://github.com/apache/netbeans/blob/master/java/java.source.base/src/org/netbeans/modules/java/source/parsing/FastJar.java#L154]
 * the other involves a call to org.netbeans.modules.j2ee.persistence.editor.completion.JPACodeCompletionProvider$JPACodeCompletionQuery.query () even though the code completion had nothing to do with JPA and neither the project nor the class use JPA



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