What about an IDE? Is there an IDE?
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GraalVM
31–40 of 108 posts
Re: GraalVM
#32Earlier quoted context omitted.
You can compile your Java code into an executable which doesn't require Java to be present. Advantages would be reduced memory footprint and quicker startup times, which could be ideal for microservices started on demand instead of constantly running. That being said, the people at Spring don't recommend it for production use yet. Here's what they have to say about it: "While GraalVM is now GA, GraalVM native image f…
Static linking is back in fashion, but it means many stale copies of the guts of Java are present, where before we had just one complete and managed copy. It's very similar to bundling your own libc when pretty much every system already has one.
You're not wrong, but with Java evolving rapidly, we're in a situation where there are dozens of commonly used JVM versions in the wild... being able to ship the most recent JVM (which can be as little as 25MB depending on which JDK modules you depend on) with your application not only allows you to benefit from using modern language features, but it also makes your application safer by using the latest runtime with the most up-to-date security fixes, not to mention performance and testing becomes a lot easier when you only have one JVM version to worry about. Also, you can have both options. I have a somewhat popular Java app that I distribute as a tiny jar (300KB, requires Java 9+) and as a stand-alone app (packaged with jlink, around 35MB including JDK 11) - and users can choose which one they want.
Re: GraalVM
#33What about an IDE? Is there an IDE?
GraalVM is just Java :) you don't need a new IDE.
Re: GraalVM
#34Intuitively how does any Java program compile into an executable?
Re: GraalVM
#35Earlier quoted context omitted.
Twitter thinks otherwise, as they are the major consumer of GraalVM in production.
GraalVM is a JIT compiler for the most part. That's the one Twitter uses I believe. SubstrateVM is what lets you perform a closed world assumption ahead of time build. And that does indeed run left performant most of the time, but it uses less memory and starts faster.
Unless one feeds it with PGO data, just like it happens in most AOT workflows for optimizations like devirtualization.
Re: GraalVM
#36Intuitively how does any Java program compile into an executable?
Instead of compiling Java to Java bytecode which is then executed by the JVM (e.g. Hotspot), you compile it to native machine code/assembly + runtime (Substrate VM). However you loose the cross-platform ability and Java reflections won't work out of the box.
Re: GraalVM
#37What about an IDE? Is there an IDE?
At least for Java / Scala etc intellij works as it would normally. You just need to point to the graalvm JDK instead of your usual JDK.
Re: GraalVM
#38As an engineer who lives and breathes java, both in the context of high performance servers and android apps, can someone explain what this does for me besides for quick startup times through the native image feature? what are the benefits of this?
You can compile your Java code into an executable which doesn't require Java to be present. Advantages would be reduced memory footprint and quicker startup times, which could be ideal for microservices started on demand instead of constantly running. That being said, the people at Spring don't recommend it for production use yet. Here's what they have to say about it: "While GraalVM is now GA, GraalVM native image f…
As a counter-point, Quarkus [1] has mature support for building Java apps as native binaries via GraalVM, with a large number of extensions that enable 3rd party libraries to be used in native binaries, and people use this successfully in production. Issues from the past, like lack of debug symbol support with GraalVM CE, have also been resolved by now.
Shameless plug for one real-world usage: the search feature of my personal blog is built as a GraalVM native binary, running as a serverless app on AWS Lambda [3].
Disclaimer: I work for Red Hat, who sponsor the development of Quarkus
[2] https://quarkus.io/guides/
[3] https://www.morling.dev/blog/how-i-built-a-serverless-search...
Re: GraalVM
#39Does graalvm work with openjdk or any java VM alternative? And does Graalvm have the weird Oracle no business use license that Oracle Java has?
The community edition of GraalVM is licensed under GPLv2
Re: GraalVM
#40I'm happy with language interoperability as a concept but how can i mix java and js in the same codebase with graalvm? And would it make sense? What are the advantages of this approach?