RFR 8197518: Kerberos krb5 authentication: AuthList's put method leads to performance issue

[Xuelei Fan]

Looks like list synchronization is a factor of the performance impact. 
Maybe, you can have a private time for the oldest entry so don't 
access/iterate/cleanup entries list until necessary.  The "at most every 
minute" may be not a good strategy in some situations.

Xuelei

On 2/22/2018 12:36 AM, Weijun Wang wrote:
> Please take a review at
> 
>     http://cr.openjdk.java.net/~weijun/8197518/webrev.00/
> 
> Two notes:
> 
> 1. I tried list.subList(here, end).clear() but it's not faster.
> 
> 2. I have looked at ConcurrentHashMap + ConcurrentSkipListMap but will need more time to verify its correctness and measure the performance gain. Since the bug is reported on 8u, a safer fix looks better.
> 
> Noreg-perf.
> 
> Thanks
> Max
>