Share context/JS bindings

[Hannes Wallnöfer]

Unfortunately, there is a problem with invalidation of callsites that Sundar brought up in the review thread for the issue I filed. 

I’ve thought about it, but there isn’t any easy way to do this without giving up significant benefits on the other side. I’m closing the issue as „won’t fix“, but I’ll continue thinking about a solution for quicker creation of global objects.

Hannes


> Am 16.06.2016 um 21:11 schrieb Tony Zakula <tonyzakula at gmail.com>:
> 
> Thank you Hannes.  That would be great.  We have tried using clear before too.
> 
> @Axel - Thank you for the stats.  Interesting to see that.  One thing we did was use strict mode and use Immediate Functions.  This would keep variables going to global scope I think.
> 
> Thanks,
> 
> Tony
> 
> On Wed, Jun 15, 2016 at 8:02 AM, Hannes Wallnöfer <hannes.wallnoefer at oracle.com> wrote:
> I prototyped the proposed change to the clear() method. It seems to work well and makes a lot of sense to me, so I filed a bug for it:
> 
> https://bugs.openjdk.java.net/browse/JDK-8159589
> 
> I haven’t discussed this with the other team members yet, so let’s see what they think.
> 
> Hannes
> 
> 
> > Am 15.06.2016 um 11:24 schrieb Axel Dörfler <axeld at pinc-software.de>:
> >
> > Am 14.06.2016 um 22:09 schrieb Tony Zakula:
> >> Interesting.  We use on global context and create a new engine context
> >> with each run.  The initial compile of several scripts is over 100ms,
> >> but then we see that drop to under 10ms.  The context creation seems to
> >> have very little overhead.  We have not timed that specifically though,
> >> just total process time.
> >
> > In my special use case which was a very short JavaScript that was used as Comparator, actual execution time was very short, so the impact of the optimizations were pretty obvious.
> > Sorting about 15000 entries took way over 10 minutes before any optimization. IIRC after using a single global engine this dropped to about 2 minutes. After also reusing the JS context, it went down to 10 seconds.
> >
> > Bye,
> >   Axel.
> >
> 
>