RFR(S): 8178811: Minimize the AVX <-> SSE transition penalty on x86

[Andrew Haley]

Hi,

On 14/04/17 19:17, Deshpande, Vivek R wrote:

> This fix minimizes the AVX to SSE and SSE to AVX transition penalty
> through generation of vzeroupper instruction.

This looks like a performance enhancement, rather than a bug.  Is JDK
9 still open for performance enhancement?  I thought we were in
rampdown, but the report is targeted to 9.

Andrew.