GraalVM is a recent development from Oracle. It's supposed to replace HotSpot just-in-time compiler technology, but actually, it's much more. From a JIT compiler to a language implementation framework for JVM to a native image generator, it's going to change how software for JVM is written and run. During the presentation, we will explore the new possibilities and benefits provided by GraalVM.

1. MACIEJ PRZEPIÓRA / SENIOR DEVELOPER
The Need for Speed
What is GraalVM?

2. Maciej Przepióra
Molecular biologist/developer/
homebrewer
ABOUT ME

3. What’s
current JVM status?
Why GraalVM is needed?
PRESENTATION PLAN
What is GraalVM?
And what
deep magic it uses?
Is it worth my 9me?
And how to get started?

4. Why GraalVM is needed?
What’s the current status of JVM?

5. Java is slow
CONTROVERSY 1 CONTROVERSY 2
Java is fast

6. IS JAVA FAST OR SLOW?
Of course, it depends

7. Stack-based VM interpreEng
byte codes

8. JIT
HotSpot has been around for
last 20 years

9. JIT
On the other hand, HotSpot
has been around for last 20
years

10. HotSpot is opEmised for DC
deployments

11. CONTROVERSY 3
Java is not cloud-friendly

12. But Spring Boot Cloud?
But NeOlix OSS?

13. CONTROVERSY 4
Java is not the best language
in the whole world

14. Again, it depends.

15. Polyglot programming

16. Polyglot programming on
JVM

17. Polyglot programming out of
JVM

18. Sloooow
INTERPROCESS IN-PROCESS
Hard

19. What if I want to implement a
new language?

20. 3. Bytecode & bc interpreter
Like Java 1.0!
1. Parser + AST interpreter
That’s how Ruby used to work
2. Run9me (GC, threads etc.)
4. JIT compiler
Good luck with that!

21. Foreign Func9ons Interface
C is universal interface
FFI

22. It’s a bit easier on JVM

23. 3. Bytecode & bc interpreter
Like Java 1.0!
1. Parser + AST interpreter
That’s how Ruby used to work
2. Run9me (GC, threads etc.)
4. JIT compiler
Good luck with that!

24. …but HotSpot is a black-box.

25. SUMMARY
HotSpot is deep magic and
has its own issues, but sEll
seems beUer than other
opEons

26. What is GraalVM?

27. JIT compiler

28. Language implementaEon
framework
(Truffle)

29. SubstrateVM & naEve-image

30. GraalVM deep magic

31. GRAALVM JIT COMPILER
ParEal Escape Analysis
•Enhanced escape analysis
•Allows for:
•Scalar replacement
•Lock elision

32. TRUFFLE
ParEal evaluaEon
& Futamura projecEons

33. PARTIAL EVALUATION
Program:
IstaEc × Idynamic = O

34. 1ST FUTAMURA PROJECTION
Interpreted program:
IstaEc × Idynamic = O

35. NATIVE IMAGE
Closed-world principle

36. And how to get started?
Is it worth your Eme?

37. SEll in research

38. CE is less powerful than EE

39. No official support from
Spring

40. How to get started?

41. Micronaut

42. QuesEons?

43. Join our super team!
spartez.com/careers