Java 7 Groovy twice as fast as Java 8 and 9

[Richard Kolb]

Hi Mani,

Thanks, yes a blog is definitely the plan.
Will keep you posted.:)

regards,
Richard

On 19 February 2015 at 02:12, Mani Sarkar <sadhak001 at gmail.com> wrote:

> All great information - thanks for sharing it with the community, could
> you publish some information maybe in the form of blog on how you went
> about and what tools you used to get these results ;)
>
> I'm sure this community will appreciate such know-how ;)
>
> Thanks again.
>
> Cheers,
> Mani
>
> On Wed, Feb 18, 2015 at 6:53 AM, Richard Kolb <rjdkolb at gmail.com> wrote:
>
>> Hi Chris,
>>
>> I am also not seeing a dramatic difference between Java 7 and 8 on Windows
>> 7 using the same machine.
>> I'll post the results on JITWatch's forum.
>>
>> regards,
>> Richard.
>>
>> On 18 February 2015 at 07:04, Richard Kolb <rjdkolb at gmail.com> wrote:
>>
>> > Hi Chris,
>> >
>> > I am running Ubuntu 14.04 64 bit with no options.
>> > I've not run it on any other platforms.
>> >
>> > Great, I will post on the other Google group.
>> >
>> > Regards,
>> > Richard.
>> > On 18 Feb 2015 00:12, "Chris Newland" <cnewland at chrisnewland.com>
>> wrote:
>> >
>> >> Hi Richard,
>> >>
>> >> I've not been able to reproduce the difference in scores you
>> encountered
>> >> although I'd be interested to know what platform and Java commands you
>> >> used to get them.
>> >>
>> >> If you like, maybe we can take this over to
>> >> https://groups.google.com/forum/#!forum/jitwatch where I think a few
>> >> Groovy users would have some ideas.
>> >>
>> >> Cheers,
>> >>
>> >> Chris
>> >>
>> >> On Tue, February 17, 2015 11:42, Richard Kolb wrote:
>> >> > Thanks Chris and Martijn.
>> >> > Much appreciated.
>> >> >
>> >> >
>> >> > Regards,
>> >> > Richard.
>> >> > On 17 Feb 2015 13:16, "Martijn Verburg" <martijnverburg at gmail.com>
>> >> wrote:
>> >> >
>> >> >
>> >> >> Hi Richard,
>> >> >>
>> >> >>
>> >> >> Yes, that and other related issues.  Basically there was a lot
>> changing
>> >> >> in Hotspot at the time (G1 GC interactions as well) and it wasn't
>> >> really
>> >> >>  deemed a stable improvement until 8
>> >> >>
>> >> >> Cheers,
>> >> >> Martijn
>> >> >>
>> >> >>
>> >> >> On 17 February 2015 at 10:59, Richard Kolb <rjdkolb at gmail.com>
>> wrote:
>> >> >>
>> >> >>
>> >> >>> Hi Chris
>> >> >>>
>> >> >>>
>> >> >>> Looks like you are correct.
>> >> >>> If I run the beanchmarks though Java 8 :'java
>> -XX:TieredStopAtLevel=1
>> >> >>> -jar
>> >> >>> benchmarks.jar' I get significant improvement
>> >> >>> (-XX:+TieredCompilation does not seem to have as much effect by
>> >> >>> itself)
>> >> >>>
>> >> >>> I assume it is turned off because of this
>> >> >>> <http://bugs.java.com/view_bug.do?bug_id=7159766> ?
>> >> >>>
>> >> >>>
>> >> >>> regards, Richard
>> >> >>> .
>> >> >>>
>> >> >>>
>> >> >>> On 17 February 2015 at 11:54, Chris Newland
>> >> >>> <cnewland at chrisnewland.com>
>> >> >>> wrote:
>> >> >>>
>> >> >>>
>> >> >>>> Hi Richard,
>> >> >>>>
>> >> >>>>
>> >> >>>> I'll run this through JITWatch [1] later and see if there is
>> >> >>>> anything obvious.
>> >> >>>>
>> >> >>>> Have you considered that with 8 and 9 you're probably hitting
>> >> >>>> tiered compilation (disabled by default in 7) which means you're
>> >> >>>> running on "quick-and-dirty" C1 optimisation for part of your
>> >> >>>> benchmark.
>> >> >>>>
>> >> >>>> If your benchmark doesn't run for long enough for C2 to kick in
>> >> >>>> then
>> >> >>> that
>> >> >>>> could be a simple reason.
>> >> >>>>
>> >> >>>> Cheers,
>> >> >>>>
>> >> >>>>
>> >> >>>> Chris
>> >> >>>>
>> >> >>>>
>> >> >>>> [1] https://github.com/AdoptOpenJDK/jitwatch/
>> >> >>>>
>> >> >>>>
>> >> >>>> On Tue, February 17, 2015 06:18, Richard Kolb wrote:
>> >> >>>>
>> >> >>>>> Hello All,
>> >> >>>>>
>> >> >>>>>
>> >> >>>>>
>> >> >>>>> I've created my own micro beanchmarks with jmh.
>> >> >>>>> It's forked to here :
>> >> >>>>> https://github.com/AdoptOpenJDK/vmbenchmarks
>> >> >>>>>
>> >> >>>>>
>> >> >>>>>
>> >> >>>>> Most of the benchmarks clearly show how performance is increasing
>> >> >>>>>
>> >> >>> except
>> >> >>>>> for Groovy.
>> >> >>>>>
>> >> >>>>
>> >> >>>
>> https://github.com/AdoptOpenJDK/vmbenchmarks/blob/master/src/main/jav
>> >> >>> a/co
>> >> >>>>> m/github/vmbenchmarks/DynamicLanguages.java
>> >> >>>>>
>> >> >>>>> Perhaps my benchmark is wrong, but it looks like 8 and 9 are
>> >> >>>>> significantly slower than 7.
>> >> >>>>>
>> >> >>>>> Java 7 (build 1.7.0_60-b19):
>> >> >>>>> c.g.v.DynamicLanguages.groovy 665.826 ops/s
>> >> >>>>>
>> >> >>>>> Java 8 (build 1.8.0_31-b13):
>> >> >>>>> c.g.v.DynamicLanguages.groovy 366.274
>> >> >>>>>
>> >> >>>>> Java 9 (build 1.9.0-ea-b42) :
>> >> >>>>> c.g.v.DynamicLanguages.groovy 375.593 ops/s
>> >> >>>>>
>> >> >>>>> regards, Richard.
>> >> >>>>>
>> >> >>>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>
>> >> >>
>> >> >>
>> >> >
>> >>
>> >>
>> >>
>>
>
>
>
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