Backport request for JDK-8059321

[Seán Coffey]

Marcus,

Is this an approval request ?  The master bug is unassigned and has no 
noreg- label. Can you fix up records there ?
Is this a clean backport for JDK 8u ? Approved if so -  Otherwise please 
get a code review before pushing.

regards,
Sean.

On 29/09/2014 22:48, Marcus Lagergren wrote:
> And the webrev is here:
>
> http://cr.openjdk.java.net/~lagergren/8059321.4/
>
> /M
>
> On 29 Sep 2014, at 14:45, Marcus Lagergren <marcus.lagergren at oracle.com> wrote:
>
>> The introduction of optimistic types in 8u40 led to numerous performance regressions in startup, because of repeated computations of types and regexp syntax validation.
>>
>> Bug was reviewed and put into 9, thread is here: http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-September/003544.html
>> JIRA entry: https://bugs.openjdk.java.net/browse/JDK-8059321
>>
>> /M
>>