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  1. JDK
  2. JDK-7017008

G1: Turn on compressed oops by default.

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    • gc
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        Whne the maximum heap size allows compressed oops to be turned on, the following code in arguments.cpp:

        #ifdef _LP64
          // Check that UseCompressedOops can be set with the max heap size allocated
          // by ergonomics.
          if (MaxHeapSize <= max_heap_for_compressed_oops()) {
        #if !defined(COMPILER1) || defined(TIERED)
            if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) {
              FLAG_SET_ERGO(bool, UseCompressedOops, true);
            }
        #endif

        turns off compressed oops when G1 is enabled.

        This is incorrect.

              johnc John Cuthbertson
              johnc John Cuthbertson
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