RFR (S): JEP-142: Reduce Cache Contention on Specified Fields

[Kirk Pepperdine]

I'm not arguing against the optimization, I clearly see the value. I'm just suggesting this is not a "Thinking in Java" solution, it's a "Thinking in C++" solution. Don't misunderstand, both are valid ways of thinking when done in the right context.  ;-)

-- Kirk

On 2012-11-26, at 9:55 AM, Aleksey Shipilev <aleksey.shipilev at oracle.com> wrote:

> On 11/26/2012 01:22 AM, Kirk Pepperdine wrote:
>> My mantra has always been, measure, don't guess.
> 
> ...said the guy before start guessing about the impact for this
> annotation :D
> 
> We know exactly where this helps, and where library developers sorely
> need this functionality, so here we are. In a few years, having this
> annotation around would help us to understand if that is applicable on
> broader scope, and what are the preconditions to be granted while
> applying this optimization. Having all that on the table, we could
> finally rationalize the budget needed to research and bringing on the
> automatic field layout. Before that, it's preposterous to invest several
> man-years into developing the optimization now known to be needed in a
> handful of cases.
> 
> -Aleksey.