RFR (M): 8143355: Update for addition of vectorizedMismatch intrinsic for x86

Deshpande, Vivek R vivek.r.deshpande at intel.com
Wed Nov 25 00:00:12 UTC 2015

Hi all

We would like to contribute a patch from Intel which optimizes vectorizedMismatch() method in java.util.ArraysSupport.java for X86 architecture using AVX instructions.
The improvement gives more than 2x gain over Unsafe implementation for long arrays.
The bug is blocked by bug: vectorized support for array equals/compare/mismatch using Unsafe (https://bugs.openjdk.java.net/browse/JDK-8136924.)
Could you please review and sponsor this patch.


Thanks and regards,

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