To allow for more accurate algorithms, the specification of DoubleStream.sum()/average() should explicitly allow higher precision summation to be used in the implementation.
            
- relates to
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                    JDK-8073940 IntStream/LongStream/DoubleStream: sum() specifications must be expanded -           
- Open
 
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                    JDK-8030942 Explicitly state floating-point summation requirements on non-finite inputs -           
- Resolved
 
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                    JDK-8006572 DoubleStream.sum() & DoubleSummaryStats implementations that reduce numerical errors -           
- Closed
 
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                    JDK-8317850 Consider add a fsum method to accurately sum a double stream (similar to python) -           
- New
 
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