RFR: 8277617: Adjust AVX3Threshold for copy/fill stubs

[David Holmes]

On 1/12/2021 11:54 pm, Jie Fu wrote:
> On Wed, 1 Dec 2021 12:41:14 GMT, David Holmes <dholmes at openjdk.org> wrote:
> 
>>  From my previous questions on this it was indicated that any CPU that supports `serialize` has the improved performance.
> 
> If so, CPUs that don't support `serialize` would behave as before.
> Then there shouldn't be any performance regression.

Yes, which is exactly why we have been saying this should not affect 
"old" CPUs.

David

> -------------
> 
> PR: https://git.openjdk.java.net/jdk/pull/6512
>