Java 7 Groovy twice as fast as Java 8 and 9

[Richard Kolb]

Hi Chris.

I would really appreciate it if you could run it through JITWatch, thanks.

I have not considered hitting tiered compilation, actually I needed to
google what that means. :)
The tests go though the normal JMH warmups, so I am guessing that is
avoided ?

If it helps, I've attached the results from the run in Java 9,8 and 7.

regards,
Richard.

On 17 February 2015 at 11:56, Richard Kolb <rjdkolb at gmail.com> wrote:

> Hi Martijn.
>
> Thanks very much.
> Let me ask Aleksey first and see if my micro benchmark is at least sane.
> I'll post his response.
>
> (I realised my Java 9 was out of date. Build 48 returns similar results.)
>
> Regards,
> Richard.
> Hi Richard,
>
> This is a good one to ask Aleksey and other performance experts!  You can
> try the friends of jclarity list (disclaimer, I run jclarity) to get advice
> from the industry or in OpenJDK I'd probably recommend posting to code
> tools or the relevant hotspot mailing list.
>
> Cheers,
> Martijn
>
> On 17 February 2015 at 06:18, Richard Kolb <rjdkolb at gmail.com> 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/java/com/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.
>>
>
>