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  1. JDK
  2. JDK-8026044

Same-type delegation breaks inlining: counted as recursive inlining

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    Details

    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 8, 9, 10
    • Fix Version/s: tbd
    • Component/s: hotspot

      Description

      Originally reported at:
      http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2012-September/008367.html

      The benchmark is attached, and requires JMH to run.
      This issue still reproduces perfectly well, for the same reason:

      o.o.p.RecursiveBench.chain11: 4.4 +- 0.1 ns/op
      o.o.p.RecursiveBench.chain12: 3.1 +- 0.1 ns/op
      o.o.p.RecursiveBench.empty: 2.0 +- 0.1 ns/op

      This issue also breaks the inlining in the case of JDK 8 Streams, in the scenarios like:
       LongStream.range(1, 10000)
         .filter(i -> i % 3 == 0)
         .filter(i -> i % 5 == 0)
         .sum();

      ...because we create the same wrapper classes for both filters.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            shade Aleksey Shipilev
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              Dates

              Created:
              Updated: