GraalVM: Run Programs Faster Everywhere

Copyright © 2019, Oracle and/or its affiliates. All rights reserved.
Run programs faster
everywhere
Oleg Šelajev
GraalVM team, Oracle Labs
@shelajev

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The following is intended to provide some insight into a line of research in Oracle
Labs. It is intended for information purposes only, and may not be incorporated
into any contract. It is not a commitment to deliver any material, code, or
functionality, and should not be relied upon in making purchasing decisions. The
development, release, and timing of any features or functionality described in
connection with any Oracle product or service remains at the sole discretion of
Oracle. Any views expressed in this presentation are my own and do not
necessarily reflect the views of Oracle.
2

Fast Java, Scala, Kotlin, Groovy, Clojure...
Instant startup, low footprint
Polyglot & embeddable VM
Interoperability between languages: node.js, Python, Ruby, R
Why GraalVM?

Java HotSpot VM
GraalVM Compiler

Java HotSpot VM
GraalVM Compiler
Truffle Framework
LLVM

Copyright © 2018, Oracle and/or its affiliates. All rights reserved. | Confidential – Oracle Internal/Restricted/Highly Restricted 11
• More performance
• Smaller footprint
• Managed runtime for better
isolation when running native code
• Oracle Enterprise Support 7x24x365
Launching earlier this month: 
GraalVM Enterprise 19.0

Renaissance suite
https://renaissance.dev

Streams API example benchmarks
https://medium.com/graalvm/stream-api-performance-with-graalvm-be6cfe7fbb52

sbt > clean; compile;
https://medium.com/graalvm/compiling-scala-faster-with-graalvm-86c5c0857fa3

Copyright © 2018, Oracle and/or its affiliates. All rights reserved. | !18
Matrix multiplication
https://www.youtube.com/watch?v=RFF2SfPMfpk

valhallaBench.Multiply.multiply (lower is better)
JDK 11 (size) Mode Cnt Score Error Units
valhallaBench.Multiply.multiply 100 avgt 3 7944.935 ± 1963.931 us/op
JDK11 + Graal (size) Mode Cnt Score Error Units
GraalVM EE 1.0-rc8 (size) Mode Cnt Score Error Units
Matrix multiplication
2.3x
2.5x

https://twitter.com/janiszt/status/1091678397523283968

22
libgraal previous setup
New in GraalVM 19: libgraal
Use Native-Image to compile
the GraalVM compiler and
link in HotSpot
• Faster startup
• No profile pollution
• Separate heap for 
the compiler

ECMAScript 6 compatibility

Graal.js on JDK11
https://github.com/graalvm/graal-js-jdk11-maven-demo

https://www.youtube.com/watch?v=mRKjWrNJ8DI

https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb

https://medium.com/graalvm/analyzing-the-heap-of-graalvm-polyglot-applications-b9963e68a6a

GraalVM native images

Native images
• Full AOT compilation to machine code
• Works with memory management
• Secure execution (e.g., bounds checks)
• Embeddable with native applications

Now, you can profile any running
program in HotSpot to generate a
configuration file for native image
You can run it multiple times to
exhaust all of the reflective test
paths (proxies, JNI, reflection)
New in GraalVM 19:  
native-image trace agent
Previously, to use Native Image with
reflection*, you needed a
configuration file
You could build it by hand, or use a
framework to generate it
$JAVA_HOME/bin/java -agentlib:native-
image-agent=config-output-dir=META-INF/
native-image/ HelloReflection foo bar

Work in progress

https://medium.com/graalvm/safe-and-sandboxed-execution-of-native-code-f6096b35c360

High performance, polyglot, language-level virtualization layer…
embeddable across the stack
in native and JVM-based applications.

Fast Java, Scala, Kotlin, Groovy, Clojure...
Instant startup, low footprint
Polyglot & embeddable VM
Interoperability between languages: node.js, Python, Ruby, R
Why GraalVM?

GraalVM: Run Programs Faster Everywhere

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GraalVM: Run Programs Faster Everywhere