(S) RFR: 8154710: [Solaris] Investigate use of in-memory low-resolution timestamps for Java and internal time API's

[Aleksey Shipilev]

On 04/29/2016 01:05 PM, David Holmes wrote:
> On 29/04/2016 7:50 PM, Aleksey Shipilev wrote:
>> On 04/29/2016 02:09 AM, David Holmes wrote:
>>> This change is small in nature but somewhat broad in scope. It "affects"
>>> the implementation of System.currentTimeMillis() in the Java space, and
>>> os::javaTimeMillis() in the VM. But on Solaris only.
>>>
>>> I say "affects" but the change will be unobservable other than in terms
>>> of performance.
>>
>> Observable enough to me.
> 
> :) Any apps you can think of that might show benefit from this?

Theoretically, this might affect heavily logging apps. IIRC, SPECjbb2000
was affected by currentTimeMillis performance. But, I see no reason in
trying to justify the change, apart from the targeted microbenchmark.

-Aleksey