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  1. JDK
  2. JDK-8001566 Concurrency updates (jsr166e) - JEP 155
  3. JDK-8005311

Add Scalable Updatable Variables, DoubleAccumulator, DoubleAdder, LongAccumulator, LongAdder

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      As part of JEP 155: Concurrency updates (jsr166e), this issue proposes to add Scalable Updatable Variables. From the JEP:

      "Scalable updatable variables. Maintaining a single count, sum, etc., that is updated by possibly many threads is a common scalability problem. A small set of new classes (DoubleAccumulator, DoubleAdder, LongAccumulator, LongAdder) internally employ contention-reduction techniques that provide huge throughput improvements as compared to Atomic variables. This is made possible by relaxing atomicity guarantees in a way that is acceptable in most applications."

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            • Assignee:
              chegar Chris Hegarty
              Reporter:
              chegar Chris Hegarty
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