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  1. JDK
  2. JDK-8068784

Halve the function object creation code size

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 9
    • 9
    • core-libs
    • b46
    • generic
    • generic

    Backports

      Description

        Currently we need 16 bytes to create a ScriptFunction in bytecode:

          new ScriptFunctionImpl
          dup
          getstatic Script$f.constants : [Object;
          iconst_1
          aaload
          checkcast RecompilableScriptFunctionData
          aload_2
          invokespecial ScriptFunctionImpl.<init>(RecompilableScriptFunctionData;ScriptObject;)V

        This can be reduced to 8 by introducing a factory method ScriptFunctionImpl.create(Object[] constants, int index, ScriptObject scope):

          getstatic Script$f.constants : [Object;
          iconst_1
          aload 2
          invokestatic ScriptFunctionImpl.create([Object;IScriptObject;)ScriptFunction;

        For methods containing lots of function declarations (e.g. typically the top-level program) this is a significant reduction in bytecode size.

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8068800 Halve the function object creation code size

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8076930 Halve the function object creation code size

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8085581 Halve the function object creation code size

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8087016 Halve the function object creation code size

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8138445 Halve the function object creation code size

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                attila Attila Szegedi
                attila Attila Szegedi
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                  Created:
                  Updated:
                  Resolved: