Help me in finding the entry points in the source code of java.....

hi...
I want to design a compilation server and apply some of the optimization technique's like inlining, SSA and others.
So i require to find the entry points in source code from where i can include my code and check the performance of the program at level it is performing .
Please help in this problem....
and i also like to know what are hot methods in java context?

BigDaddyLoveHandles wrote:
Do you even know Java? Why not just let the HotSpot optimization do its thing?Good point, I would try either of two things.
If you have a good understanding of Java internals and are confident you could optimise code better, I suggest you contribute to the OpenJDK and we can all benefit.
Otherwise I suggest you try using the optimisation built into the compiler and the JVM.
Note: the JVM optimises the code dramatically in ways most normal people won't have thought possible.
The compiler doesn't optimise the code so much as it leaves this job to the JVM.
Two examples;
- say you call a small method often. The JVM can inline this method for you. (the same way a compiler would) However say this method can be over-ridden and later your program calls a different implementation, it can inline both methods even if the new method in a new class didn't exist when the first method was inlined.
- In a 32-bit JVM, 32-bit registers and references are used. In a 64-bit JVM 64-bit registers and references are used without needing to recompile the code. However there is a third option of using 32-bit references in a 64-bit JVM. In this case, it assumes the bottom 3 bits are always 000 so it shifts the reference down 3 bits allowing you to access 32 GB using 32-bit references. Again, you can use this with libraries which were compiled before 64-bit JVMs were available.

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