JDK-8134150 : Make Nashorn Timing class both threadsafe and efficient
  • Type: Bug
  • Component: core-libs
  • Sub-Component: jdk.nashorn
  • Affected Version: 9
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2015-08-21
  • Updated: 2016-01-14
  • Resolved: 2015-08-24
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8u72Fixed 9 b80Fixed
Timing.java in Nashorn currently uses a LinkedHashMap<String, Long> to record compilation timings. This is grossly inefficient (not to mention not being thread safe). The solution is to switch to using a ConcurrentHashMap<String, LongAdder> instead; with a separate LinkedBlockingQueue<String> to preserve ordering of stats.