RFR 8161445: [BACKOUT] MemberNameTable doesn't purge stale entries

[Coleen Phillimore]

Thanks, Eric.
Coleen

On 8/1/16 2:02 PM, Eric Caspole wrote:
> Hi Coleen,
> Looks good.
> Thanks,
> Eric
>
>
> On 07/29/2016 01:52 PM, Coleen Phillimore wrote:
>> Summary: Original change caused performance regression in
>> microbenchmarks after GC
>>
>> Eric Caspole's additional performance measurements are in the bug
>> report.  Also, I don't think it was a good idea for the jvm to intern
>> MemberName assuming they are immutable.   The interning should be in
>> Java code.  I didn't see a huge advantage to interning these as there
>> weren't a big proportion of duplicates that I could see in my logging. I
>> added a REDO bug and contacted the submitter for the severity of this
>> problem in real life, since what they sent was a microbenchmark as well.
>>
>> Tested with JPRT and original test case.  The backout was clean and had
>> no conflicts.
>>
>> open webrev at http://cr.openjdk.java.net/~coleenp/8161445/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8161445
>>
>> Thanks,
>> Coleen