[CLOSED] Investigate/measure the AOT feature of OpenJDK about avm

[aionbot]

Comment by JunhanHu-aion (on Thursday May 17, 2018 at 20:53 GMT)

The AOT interface of JDK10 is the following.

To start AOT compilation:
jaotc --output libHelloWorld.so HelloWorld.class

To load AOT compiled code:
java -XX:AOTLibrary=./libHelloWorld.so HelloWorld

AOT is not likely helpful with our current design. We are only going to have one JVM instance for contract execution, there is no interface to dynamically loading AOT library into active JVM.

Another possible direction is to AOT java.base. This also seems like a bad idea since one single active JVM will eventually load/JIT compile the java.base. Using a AOT java.base only decrease the performance since it misses run time JIT optimization opportunity.

[aionbot]

Comment by romaion (on Thursday May 17, 2018 at 21:41 GMT)

If (are only going to have one JVM instance for contract execution) then nothing can beat (in terms or memory and performance) Substrate VM native images.