JDK-8060130 : Simplify the synchronization of defining and getting java.lang.Package
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2014-10-10
  • Updated: 2015-06-04
  • Resolved: 2014-11-05
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9 b39Fixed
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Current code in j.l.ClassLoader and j.l.Package for retrieving packages use coarse-grained synchronization on shared collections and could be simplified by using concurrent utilities. 

Furthermore, when defining Packages, the reading of Manifests from jar files is synchronized globally, which prohibits reading of manifests from different jar files in parallel, which could be a startup bottleneck for some applications.