GraalVM 22.3: JDK 19 builds, jlink support, new monitoring features, and more

Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by ravedave5 on Tuesday October 25, 2022 @01:41PM (#33333766)

Graal seems to be continually almost ready to use, but never quite there.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by metadat on Tuesday October 25, 2022 @02:02PM (#33334076)

What do you mean? I've been using it as the default JVM since 2019 or so in both development and production.

My experience has involved zero headaches or serious problems due to Graal, and it comes with appreciable performance improvements.

One of the more impressive and badass hardcore programming language engineering efforts, and still under active development right now. It's remarkable technology.

Amazing that it comes from within Oracle, I was surprised.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by Scarbutt on Tuesday October 25, 2022 @02:09PM (#33334159)

My experience has involved zero headaches

How? most libs use reflection.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by kasperni on Tuesday October 25, 2022 @02:24PM (#33334336)

GraalVM comes with its own JIT the Graal Compiler [1] which I believe was what metadat was talking about. You are probably thinking about the native image generation which can cause issues with reflection and other dynamic constructs.

[1] https://www.graalvm.org/22.3/reference-manual/java/compiler/

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by cogman10 on Tuesday October 25, 2022 @02:29PM (#33334400)

Reflection only matters if you are using graal for AOT. It's still a full JVM.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by fniephaus on Tuesday October 25, 2022 @04:28PM (#33335709)

Also, reflection is supported in AOT mode. The analysis, however, does require reachability metadata in some cases. In the best case, libraries provide and maintain appropriate configuration for this. Reachability metadata can also be shared via https://github.com/oracle/graalvm-reachability-metadata.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by the-alchemist on Tuesday October 25, 2022 @05:24PM (#33336362)

There's two pieces to GraalVM:

1. The new JIT

2. The Native Image, AOT

Reflection is an issue for (2), not (1).

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by za3faran on Wednesday October 26, 2022 @02:12PM (#33347341)

Are you able to use JFR or similar tools with GraalVM?

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by pjmlp on Tuesday October 25, 2022 @04:15PM (#33335555)

Twitter has been using it in production for ages now.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by gavinray on Tuesday October 25, 2022 @07:55PM (#33337835)

Another vote from me for "I use it in regular JIT/JVM mode for my daily development + production JVM".

It's a kickass JVM with stellar performance and bonus profiling/observability tools.

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Re:GraalVM 22.3: JDK 19 builds, jlink support, new monitorin... by kaba0 on Wednesday October 26, 2022 @06:17AM (#33341767)

Twitter runs most of their infrastructure on Graal EE, so it sounds quite reliable to me.

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