Truffle on stock OpenJDK >= 11

Raffaello Giulietti raffaello.giulietti at
Thu Mar 21 17:44:46 UTC 2019

On 2019-03-21 18:24, Jaroslav Tulach wrote:
> Dne čtvrtek 21. března 2019 9:48:49 CET, Raffaello Giulietti napsal(a):
>> Hi Jaroslav,
>> Did you perhaps run some measurements to assess the relative performance
>> of GraalVM versus OpenJDK+Graal? I'm curious whether there are
>> substantial differences and why, if at all.
> Hello Raffaello,
> as far as I can say I haven't noticed any difference between [GraalVM CE]
> ( RC 12 and OpenJDK11 with the
> binaries for RC12 like [truffle-api](
> graalvm/truffle/truffle-api-1.0.0-rc12/) and co. downloaded from Maven.
> -jt

Hi Jaroslav,

good to know.

Then the question becomes: what's the point of using GraalVM to execute 
a polyglot long-running application environment?

Don't get me wrong. I admire GraalVM and the related technologies. But 
OpenJDK+Graal seems a more cautious, enterprise-friendly choice and 
seems to be equipped with better GCs. So, if there are no big 
performance differences (if at all), the choice between GraalVM and 
OpenJDK+Graal seems to lean towards the latter.

Am I getting the picture correctly?


>> On 2019-03-21 06:28, Jaroslav Tulach wrote:
>>> Hello Raffaello,
>>> recently I needed a "getting started" project for educational purposes.
>>> I've created:
>>> The `` class is all that is needed to switch into Truffle
>>> compilation mode and use all the Truffle APIs to "talk to the compiler".
>>> -jt
>>>> Given that Graal is part of recent stock OpenJDKs, is it possible to use
>>>> Truffle on them? This is not stated explicitly on the Truffle GitHub
>>>> repo [1], which mentions prebuilts in GraalVM but does not mention
>>>> OpenJDK.
>>>> More generally, which components of GraalVM listed in [2] can be built
>>>> and used on OpenJDK 11 or newer?
>>>> Greetings
>>>> Raffaello
>>>> ----
>>>> [1]
>>>> [2]

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