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  1. JDK
  2. JDK-4809552

Optimize Arrays.fill(...)

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    • b07
    • x86
    • windows_2000
    • Not verified

    Backports

      Description

        Name: rmT116609 Date: 01/28/2003


        DESCRIPTION OF THE PROBLEM :
        System.arraycopy() performs brilliantly on Intel/AMD CPUs as it maps right on down to a single REP MOVS instruction. Perhaps an order of magnitude faster than the same thing in a normal loop.

        I'd like a System.arrayfill() method that could be built on a REP STOS operation.

        (Today I'm initializing buffers for a b-tree. Need to blank-fill the text buffer - a pretty common thing to do. Index efficiency is critical to DB operations, so speed matters here.)

        (Review ID: 180473)
        ======================================================================

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            backported by

            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-2199986 Optimize Arrays.fill(...)

            • 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-2200008 Optimize Arrays.fill(...)

            • 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-2201466 Optimize Arrays.fill(...)

            • 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-2200255 Optimize Arrays.fill(...)

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

            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-2200256 Optimize Arrays.fill(...)

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

            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-2205832 Optimize Arrays.fill(...)

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8307683 Loop Predication should not hoist range checks with trap on success projection by negating their condition

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-6982370 SIGBUS in jbyte_fill

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-6981773 incorrect fill value with OptimizeFill

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-6302620 Range checks are unnecessary in Arrays.fill() when filling an entire array

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

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                never Tom Rodriguez
                rmandalasunw Ranjith Mandala (Inactive)
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