RFR(S): 8205194: Improve the Array Comparison when there is a mismatch at first element.

[Roger Riggs]

Hi Vivek,

Do you need to concerned that the arrays are zero length?

Are there any tests that test the zero length case.
(I assume you ran the existing tests).

Thanks, Roger


On 6/18/2018 7:52 PM, Deshpande, Vivek R wrote:
> Hi All
>
> Forgot to add the links:
> https://bugs.openjdk.java.net/browse/JDK-8205194
> webrev:
> http://cr.openjdk.java.net/~vdeshpande/vectorizedMismatch_jdk/webrev.00/
>
> Regards.
> Vivek
>
> From: Deshpande, Vivek R
> Sent: Monday, June 18, 2018 4:50 PM
> To: 'jdk-dev at openjdk.java.net' <jdk-dev at openjdk.java.net>
> Cc: 'Paul Sandoz' <paul.sandoz at oracle.com>; Viswanathan, Sandhya <sandhya.viswanathan at intel.com>
> Subject: RFR(S): 8205194: Improve the Array Comparison when there is a mismatch at first element.
>
> Hi All
>
> I would like to contribute a patch which improves the array comparison when there is a mismatch for the first element.
> This avoids call to vectorizedMismatch method and gives ~80x speed up.
> Please review and sponsor the patch.
>
> Regards,
> Vivek
>