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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-4295) GridUnsafe: implement specialized methods for every kind of copy operation.
Date Thu, 24 Nov 2016 08:32:59 GMT
Vladimir Ozerov created IGNITE-4295:
---------------------------------------

             Summary: GridUnsafe: implement specialized methods for every kind of copy operation.
                 Key: IGNITE-4295
                 URL: https://issues.apache.org/jira/browse/IGNITE-4295
             Project: Ignite
          Issue Type: Task
          Components: general
    Affects Versions: 1.8
            Reporter: Vladimir Ozerov
            Assignee: Vladimir Ozerov
            Priority: Minor
             Fix For: 2.0


1) copy(OFFHEAP, HEAP)
2) copy(HEAP, OFFHEAP)
3) copy(OFFHEAP, OFFHEAP)
4) copy(HEAP, HEAP) 
5) copy(T[], T[]) must be avoided and replaced with System.arrayCopy().
6) Add optional threshold. If we copy too small memory chunk which size is below the threshold,
then resort to byte-by-byte copying, as it will be faster.

E.g. on PowerPC with OpenJDK 8, copying of <100 bytes of data is faster on byte-by-byte
basis.



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