JDK-8221355 Performance regression after JDK-8155635 backport into 8u not in 8u212

[Aleksey Shipilev]

On 4/10/19 10:53 AM, Aleksey Shipilev wrote:
> On 4/10/19 10:48 AM, Aleksey Shipilev wrote:
>> On 4/10/19 10:39 AM, Langer, Christoph wrote:
>>> As per the diff filter OpenJDK 8u212 vs. Oracle 8u212 [0], the issue JDK-8221355 "Performance
>>> regression after JDK-8155635 backport into 8u" is part of Oracle's update but not in the OpenJDK
>>> version.
>>>
>>> This fix is not available in public but I guess it can be done by an experienced engineer from
>>> the issue comments.
>>
>> I'll take a look (or loop in Roland). Maybe Oracle folks do us a solid one and publish the fix?
> 
> Forgot to mention: this probably misses ongoing CPU, as the compiler fix there is risky and
> invalidates lots of testing already done. Unless we collectively think the absence of it is the end
> of the world.

Severin had successfully reproduced the regression, handing over to him. Plus, we think that the fix
in the comment there is the final one:
  https://bugs.openjdk.java.net/browse/JDK-8221355?focusedCommentId=14255045#comment-14255045

Thanks,
-Aleksey